20 Best Smart Plug 220v [2024]

Are you looking for the best smart plug 220v? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling smart plug 220v.

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1 eMylo Smart WiFi Light Switch Wireless Relay Switch AC 220V 2 Channel Tuya Module App 90-250V Remote... eMylo Smart WiFi Light Switch Wireless Relay Switch AC 220V 2 Channel Tuya Module App 90-250V...
2 Suraielec WiFi Pool Timer, Outdoor Indoor Smart Switch, 40 AMP, 2HP, 120, 240, 277 VAC, Heavy Duty... Suraielec WiFi Pool Timer, Outdoor Indoor Smart Switch, 40 AMP, 2HP, 120, 240, 277 VAC, Heavy...
3 Smart Plug ESICOO - Alexa, Echo & Google Home - Only WiFi 2.4G (4-Pack) Smart Plug ESICOO - Alexa, Echo & Google Home - Only WiFi 2.4G (4-Pack)
4 Kasa Smart Plug HS103P4, Smart Home Wi-Fi Outlet Works with Alexa, Echo, Google Home & IFTTT, No Hub... Kasa Smart Plug HS103P4, Smart Home Wi-Fi Outlet Works with Alexa, Echo, Google Home & IFTTT, No...
5 DESTINLEE Smart Plug WiFi Wireless - WiFi Wireless Smart Power Socket EU Plug Remote Socket Smart... DESTINLEE Smart Plug WiFi Wireless - WiFi Wireless Smart Power Socket EU Plug Remote Socket Smart...
6 Svipear Smart Plug with 2xUSB(10A, 100-240V), WiFi Socket Compatible with Alexa, Google Home, No Hub... Svipear Smart Plug with 2xUSB(10A, 100-240V), WiFi Socket Compatible with Alexa, Google Home, No...
7 DEWENWILS Pool Pump Timer, Outdoor Smart Wi-Fi Box, Heavy Duty 40A 120-277 VAC 2HP Wireless... DEWENWILS Pool Pump Timer, Outdoor Smart Wi-Fi Box, Heavy Duty 40A 120-277 VAC 2HP Wireless...
8 Amazon Smart Plug, for home automation, Works with Alexa - A Certified for Humans Device Amazon Smart Plug, for home automation, Works with Alexa - A Certified for Humans Device
9 Kasa Smart HS100 WiFi Smart Plug, Classic 1-Pack, White Kasa Smart HS100 WiFi Smart Plug, Classic 1-Pack, White
10 Govee Smart Plug, WiFi Plugs Work with Alexa & Google Assistant, Smart Outlet with Timer & Group... Govee Smart Plug, WiFi Plugs Work with Alexa & Google Assistant, Smart Outlet with Timer & Group...
11 IBRIGHT Smart Plug, High Security with Overload Protection, Smart Wi-Fi Outlet Compatible with... IBRIGHT Smart Plug, High Security with Overload Protection, Smart Wi-Fi Outlet Compatible with...
12 Aeotec Heavy Duty Smart Switch, Z-Wave Plus Home Security ON/Off Controller, 40 amps. Electricity... Aeotec Heavy Duty Smart Switch, Z-Wave Plus Home Security ON/Off Controller, 40 amps. Electricity...
13 Charger for Nintendo Switch,AC Adapter for Nintendo Switch - Fast Travel Wall Charger with 5FT USB... Charger for Nintendo Switch,AC Adapter for Nintendo Switch - Fast Travel Wall Charger with 5FT...
14 Smart Plug Compatible with Alexa and Google Home for Voice Control, Mini Smart Outlet WiFi Socket... Smart Plug Compatible with Alexa and Google Home for Voice Control, Mini Smart Outlet WiFi Socket...
15 Kasa Smart Light Switch HS200, Single Pole, Needs Neutral Wire, 2.4GHz Wi-Fi Light Switch Works with... Kasa Smart Light Switch HS200, Single Pole, Needs Neutral Wire, 2.4GHz Wi-Fi Light Switch Works...
16 4PCS Elelight PE1004T Smart Sockets Remote Control Outlet with Timing Function,EU Plug 4PCS Elelight PE1004T Smart Sockets Remote Control Outlet with Timing Function,EU Plug
17 2.4GHz Smart Outlet 15A, Alexa Smart Plugs That Work with Alexa, Remote & Voice Remote Control,... 2.4GHz Smart Outlet 15A, Alexa Smart Plugs That Work with Alexa, Remote & Voice Remote Control,...
18 Smart Plug,WiFi Smart Socket Compatible with Alexa and Google Home for Voice Control, VAIYI Mini... Smart Plug,WiFi Smart Socket Compatible with Alexa and Google Home for Voice Control, VAIYI Mini...
19 Smart Plug, PORIK WiFi Outlet Smart Home Plugs that Work with Alexa, Google Assistant & SmartThings,... Smart Plug, PORIK WiFi Outlet Smart Home Plugs that Work with Alexa, Google Assistant &...
20 GE LED Night Light, Plug-in, Dusk to Dawn Sensor, Warm White, UL-Certified, Energy Efficient, Ideal... GE LED Night Light, Plug-in, Dusk to Dawn Sensor, Warm White, UL-Certified, Energy Efficient,...
Bestseller No. 1
eMylo Smart WiFi Light Switch Wireless Relay Switch AC 220V 2 Channel Tuya Module App 90-250V Remote...
  • ♥ Smart WiFi Switch---eMylo smart WiFi switch enables users to remotely control all the connected appliances via the mobile app “Smart Life”....
  • ♥  APP Remote Control Switch ---- Connect with home Wi-Fi without hub required, high-performance Tuya chip module, Remotely turn on/off light or...
  • ♥  Voice Control System: Works with Amazon Alexa Echo and Google Assistant to manage your devices through Voice Control. It's simple and...
  • ♥  Easy Installation ---- Less than 10 seconds to wiring eMylo WiFi switch with your devices. Simple, convenient, durable insulated terminals, you...
  • ♥  Timer & Count Down Switch---- Set timer schedules to automatically on/ off home appliances based on your preferences. You can set...
SaleBestseller No. 2
Suraielec WiFi Pool Timer, Outdoor Indoor Smart Switch, 40 AMP, 2HP, 120, 240, 277 VAC, Heavy Duty...
  • 【 Heavy Duty 40 AMP Pool Timer Switch 】 120 to 277 VAC, 40A Resistive, 1HP to 2HP capacity allows the timer box to be used to control high-power...
  • 【 Controlled by Tuya Smart Life APP 】 Support 2.4 GHz Wi-Fi network only; The pool timer outlet box can be remotely controlled by your smartphone...
  • 【 Versatile Timer Function 】 Simple operation interface; Heavy duty WiFi outdoor timer switch offers program, countdown, random and repeat timer...
  • 【 Weatherproof for Outdoor Use 】 Raintight and rust-proof construction; Pool pump box timer is made of durable insulating and flame retardant...
  • 【 Easy to Install and Program 】 This pool pump timer is very easy to install; Once set up, it keeps your pool or other electric devices running on...
SaleBestseller No. 3
Smart Plug ESICOO - Alexa, Echo & Google Home - Only WiFi 2.4G (4-Pack)
  • Smart remote control : the smart plug works with amazon alexa and google home which helps to manage your home devices through voice control. You can...
  • Timer function : switch your home appliances on/off automatically and intelligently by setting a specific time with the smart plug. You can make a...
  • Easy to install and use : this smart plug connects with internet through wi-fi network(only 2.4Ghz). no hub and subscription required, just plug it...
  • Easy to install and use : this smart plug connects with internet through wi-fi network(only 2.4Ghz). no hub and subscription required, just plug it...
  • Wide application : the smart socket can be used for any home appliances, such as lights, electric ovens, toasters, fans, air-conditioners and coffee...
SaleBestseller No. 4
Kasa Smart Plug HS103P4, Smart Home Wi-Fi Outlet Works with Alexa, Echo, Google Home & IFTTT, No Hub...
  • Voice control: Kasa smart plugs that work with Alexa and Google Home Assistant. Enjoy the hands free convenience of controlling any home electronic...
  • Smart Outlet Control from anywhere: Turn electronics on and off your smart home devices from anywhere with your smartphone using the Kasa app, whether...
  • Scheduling: Use timer or countdown schedules to set your wifi smart plug to automatically turn on and off any home electronic appliances such as...
  • Easy set up and use: 2.4GHz Wi-Fi connection required. Plug in, open the Kasa app, follow the simple instructions and enjoy
  • Trusted and reliable: Designed and developed in Silicon Valley, Kasa is trusted by over 5 Million users and being the reader’s choice for PCMag...
Bestseller No. 5
DESTINLEE Smart Plug WiFi Wireless - WiFi Wireless Smart Power Socket EU Plug Remote Socket Smart...
  • WiFi Remote Control-Free "Smart Life" APP control with your smartphone and tablet through Wi-Fi networks.
  • Timing-Set scheduled/countdown/loop timers to turn on/off at specified time.
  • Share Control- Control your smart home together with your family.
  • Voice Control -Works perfectly with for Amazon Alexa/for Google Assistant.
  • Remote ON/OFF-Turn electrical devices on/off from anywhere.
Bestseller No. 6
Svipear Smart Plug with 2xUSB(10A, 100-240V), WiFi Socket Compatible with Alexa, Google Home, No Hub...
  • ✔VOICE COMMAND TO CONTROL: Svipear smart plugs that work with Alexa and Google Home Assistant. Just give a simple voice command to control your home...
  • ✔SCHEDULE & TIMER: Svipear smart power strip can schedule each outlet individually or in group to power on/off automatically based on your time...
  • ✔REMOTE CONTROL FROM ANYWHERE: Svipear google smart plug can help you control your home appliances from anywhere. Even you are not at home, you also...
  • ✔Space Saving: Svipear smart power strip is compact designed but multi-fuction desk top smart plugs. 1 smart outlets, 1 switch button and 2 USB...
  • ✔EASY TO INSTALL AND SAFE: Just plug a device into the mini wifi smart outlet and connect to your secured 2.4GHz network with "Magic Home Pro" App....
Bestseller No. 7
DEWENWILS Pool Pump Timer, Outdoor Smart Wi-Fi Box, Heavy Duty 40A 120-277 VAC 2HP Wireless...
  • HIGH POWER LOAD- Max 40 Amp 120-277VAC 2HP load, ideal for outdoor/indoor heavy duty applications like water heaters, pool pumps, fountains, spa,...
  • REMOTE & VOICE CONTROL-Control connected electrical devices by your smart phone from anywhere or by your voice commends(compatible with Alexa & Google...
  • OUTDOOR RATED- Metal cover and waterproof pad design,prevent rainwater from flowing into the junction box along the aperture, free yourself from the...
  • EASY TO INSTALL&SET - Wi-Fi enabled to use your existing wireless router with no setup, or monthly charges, illustrated instruction help you to...
  • WARM AFTER-SALES SERVICE- One year warranty provided,if you face any technical issue, please feel free to contact us to get professional help.
Bestseller No. 8
Amazon Smart Plug, for home automation, Works with Alexa - A Certified for Humans Device
  • Amazon Smart Plug works with Alexa to add voice control to any outlet.
  • Certified for Humans - Struggle-free, tinker-free, stress-free. No patience needed—it's actually simple.
  • Schedule lights, fans, and appliances to turn on and off automatically, or control them remotely when you’re away.
  • Simple to set up and use—plug in, open the Alexa app, and get started in minutes.
  • Compact design keeps your second outlet free.
SaleBestseller No. 9
Kasa Smart HS100 WiFi Smart Plug, Classic 1-Pack, White
  • Control From Anywhere: Turn electronics on or off from anywhere with your smartphone using the Kasa app (Compatible w/ Android & iOS)
  • Voice Control works with amazon Alexa, Google Assistant and Microsoft Cortana supported devices for a hands free experience; Operating Temperature: 0...
  • Flexible Control: UL Certfied to switch upto 15A, for flexible control of a wide range of plug in devices
  • Kasa scenes & schedules: Schedule the Smart plug to automatically switch on and off when away or set a scene for controlling many devices with a...
  • Note: Requires a secured 2.4 gigahertz wifi network connection
Bestseller No. 10
Govee Smart Plug, WiFi Plugs Work with Alexa & Google Assistant, Smart Outlet with Timer & Group...
  • Smart Voice Control: WiFi Plugs Work with Amazon Alexa and Google Assistant, so you can control the smart home devices using simple voice commands....
  • Scheduling & Group Controller: Create customized schedules to power your electronic appliances on/off automatically for helping save energy and money....
  • Anywhere Anytime Control: With the Govee Home App, you can manage your smart plug from anywhere with stable 2.4GHz WiFi, whether you are at home, in...
  • Multiple safeguards & Small Size: With ETL & FCC certified, the quality of smart plug is assessed. Our product is rated: 10A, 1100W and support...
  • Easy Install and Use: Download the Govee Home App and search for H5081, you can pair smart outlet successfully in minutes without barrier in smart...
Bestseller No. 11
IBRIGHT Smart Plug, High Security with Overload Protection, Smart Wi-Fi Outlet Compatible with...
  • 【SMART LIFE WITH FLEXIBLE CONTROL】Free up your hands by using simple voice commands with Alexa, Google Assistant and IFTTT to make appliances turn...
  • 【COUNT DOWN TIMER & SCHEDULE SETTING】Create a customized schedule for Wi-Fi smart plugs to make appliances turn on/off at a specific time. Let...
  • 【MEMORY FUNCTION WITHOUT REPEATED OPERATIONS】Smart plugs have the function of schedule memory. It can remember everything you set including the...
  • 【GROUP CONTROL & DEVICE SHARING】Set up groups for Wi-Fi smart plugs, control several smart outlets under a group in one command through the app....
  • 【OVERLOAD PROTECTION & SAFE MATERIAL】The smart plug adopts premium materials and techniques. There are V-0 thermoplastics and pure copper...
SaleBestseller No. 12
Aeotec Heavy Duty Smart Switch, Z-Wave Plus Home Security ON/Off Controller, 40 amps. Electricity...
  • Zwave Controller - Electronics don’t always have to be turned, just when we need them. Zwave Heavy Duty lets you automate and schedule the operation...
  • Wireless 220v Remote Control Switch. - In the event of an emergency, Zwave switch can be used to turn off the electronics that Z Wave switch are...
  • Money control - High-power electronics tend to be those that cost the most amount of money to run. Heavy Duty Smart Switch can calculate and report...
  • Emergency control - In the event of an emergency, Z-Wave can be used to turn off the electronics that Heavy Duty Smart Switch are connected to....
  • Compatible with zwave hub, SmartThings, Open Z-Wave, Wink, Vera UI7, HomeSeer, Home Assistant. Z-wave certification Number: zc10-14090014
Bestseller No. 13
Charger for Nintendo Switch,AC Adapter for Nintendo Switch - Fast Travel Wall Charger with 5FT USB...
  • Support TV Mode - This nintendo switch charger supports handheld mode, also works for switch docking and playing on a TV. if you don't like to unplug...
  • Fast Charging - The premium attached extra long 5 Feet USB-C Integrated cable fit all type-C device. Input: 100-240V~50/60Hz 1A; Output: 5V 3A/15V...
  • Wide Use - The switch charger is designed for Nintendo Switch/Switch Lite and Switch OLED, and compatible with chargering in both dock station and pro...
  • Safe Enough and Multi-protection- Approved for CE-FCC-RoHS certification. The built-in "smart PD(Power Delivery) IC" & the thermal material design...
  • Reliable Quality - Buy with Confidence. Please just freely contact us for any quality problems, we would be much glad to help you out.
SaleBestseller No. 14
Smart Plug Compatible with Alexa and Google Home for Voice Control, Mini Smart Outlet WiFi Socket...
  • [Remote Control] Control your smart plug via your phone whenever and wherever you are after downloading the FREE APP Smart Life as long as there is a...
  • [Schedule Timer] Schedule the smart plugs or set auto-off timer routine to work automatically as needed, saving energy and money. Your data is...
  • [Voice Control] Compatible with Amazon alexa, Google home assistant, control your home appliances with the smart plug by simply giving voice commands...
  • [Warm Tips] Feel free to contact us via Amazon if you have any problems with our products.
  • [Set Up Easily] Simply plug mini outlet into an electrical outlet, connect a device to the Smart Plug, and wireless control your device using a tablet...
SaleBestseller No. 15
Kasa Smart Light Switch HS200, Single Pole, Needs Neutral Wire, 2.4GHz Wi-Fi Light Switch Works with...
  • Easy guided install: Neutral wire is required, standard wall plate size. No need to understand complex switch wiring or master vs auxiliary switch...
  • Control from anywhere: Monitor your light status. Turn electronics on and off from anywhere with your smartphone using the Kasa app, whether you are...
  • Voice control: Enjoy the hands-free convenience of controlling the lights in your home with your voice via Amazon Alexa or Google Assistant; perfect...
  • Scheduling: Use timer or countdown schedules to set your smart switch to automatically turn on and off while you're home or away. Enable ‘away...
  • Trusted and reliable: Designed and developed in silicon valley, Kasa is trusted by over 4 million users. UL certified for safety use.
Bestseller No. 16
4PCS Elelight PE1004T Smart Sockets Remote Control Outlet with Timing Function,EU Plug
  • - Easy operation Just scan the QR code to download its APP and then you can control your household appliances through the APP on your smartphone or...
  • - Remote control With the functions of IFTT control and WiFi control, you can control this mini smart socket at any time or any place in the world by...
  • - Voice control Works with Google Home, Amazon Alexa, allowing you to control your household appliances by voice control, rather convenient.
  • - Timing function You can preset when to turn on or turn off your lamps, air conditioners, water heaters, chargers and other home appliances according...
  • - Mini design With the compact and mini design, easy to store and carry, this WiFi smart socket only occupies one outlet place without interfering...
Bestseller No. 17
2.4GHz Smart Outlet 15A, Alexa Smart Plugs That Work with Alexa, Remote & Voice Remote Control,...
  • Remote Control & Voice Control --- Enables you to control your electricals via mobilephone from anywhere at anytime. This smart plug also works with...
  • Schedule & Timer Function --- Create customized schedule/timer with this smart plug to your smart home device, and this smart outlet will trun on/off...
  • User-friendly Design --- The latest SP20 design perfectly fit into US wall socket and won't interfere another plugs. Smart plug 15 Amp means you don't...
  • Easy to Set up --- Quick and easy steps save your time. Scan QR code and download attached APP. Follow the user manual, then you can own your smart...
  • Reliable After-sales-service--- Our smart home only supports 2.4G wifi network. Please feel free to contact us via Amazon if you meet any problems...
Bestseller No. 18
Smart Plug,WiFi Smart Socket Compatible with Alexa and Google Home for Voice Control, VAIYI Mini...
  • Voice Control: Smart plug works with Alexa and Google Home, control your home appliances with the smart plug by simply giving voice commands
  • Remote Control: Control the smart outlet to access and Manage your appliances via your phone whenever and wherever you are.
  • Schedule & Timer:Create customized timer and schedule to automatically turn on or off your any home electronics and appliances,Eliminate wasteful...
  • Easy to install and Safe:Just plug a device into the mini wifi smart outlet and connect to your secured 2.4GHz network with Smart Life App ,No Hub...
  • Wide application & Create Group : the smart socket can be used as switch to control your all home appliances .Set a group for all google home outlets...
Bestseller No. 19
Smart Plug, PORIK WiFi Outlet Smart Home Plugs that Work with Alexa, Google Assistant & SmartThings,...
  • ⚡【Remote & Voice Control】- Wifi plug controls your electrical appliances on/off from anywhere with a smartphone via Smart LIfe or OSAIO APP....
  • ⚡【Timer Function】- Bring convenience and efficiency to your life. The functions of schedule, timer, random, and circulate can meet your various...
  • ⚡【Easy to Use & Install】- Quick and easy installation saves you time. Download the Smart Life app, simply follow the user manual for a few...
  • ⚡【Device Sharing】- Share your wifi plugs that work with Alexa with your family members in a minute. One-click sharing makes family smart life...
  • ⚡【Warranty】- We provide a 24-month warranty period. If you encounter any problems while using the smart plug, contact our customer service and...
SaleBestseller No. 20
GE LED Night Light, Plug-in, Dusk to Dawn Sensor, Warm White, UL-Certified, Energy Efficient, Ideal...
  • Light when you need It: With light sensing technology, this night light automatically turns ON at dusk and OFF at dawn
  • Extended Life: Long lasting, energy efficient LED means no bulbs to replace and the light source feels cool to the touch, even after extensive use
  • Compact Night Light: The modern night light design plugs into any standard unused indoor outlet while leaving the 2nd outlet free for use
  • Home Decor: Compliment your home with this night light’s stylish, glossy white finish
  • Safe and Dependable: This reliable night light is UL listed, designed in the USA and comes with a lifetime for your peace of mind

Having trouble finding a great smart plug 220v?

This problem is well understood by us because we have gone through the entire smart plug 220v research process ourselves, which is why we have put together a comprehensive list of the best smart plug 220vs available in the market today.

After hours of searching and using all the models on the market, we have found the best smart plug 220v for 2023. See our ranking below!

How Do You Buy The Best Smart Plug 220v?

Do you get stressed out thinking about shopping for a great smart plug 220v? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching smart plug 220v, which is why we have assembled a comprehensive list of the greatest smart plug 220v available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for smart plug 220v that you consider buying. Your questions might include the following:

  • Is it worth buying an smart plug 220v?
  • What benefits are there with buying an smart plug 220v?
  • What factors deserve consideration when shopping for an effective smart plug 220v?
  • Why is it crucial to invest in any smart plug 220v, much less the best one?
  • Which smart plug 220v are good in the current market?
  • Where can you find information like this about smart plug 220v?

We’re convinced that you likely have far more questions than just these regarding smart plug 220v, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for smart plug 220v, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible smart plug 220v. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an smart plug 220v buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available smart plug 220v currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of smart plug 220v has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an smart plug 220v?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your smart plug 220v.
  5. Customer Ratings: Number ratings grade smart plug 220v objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their smart plug 220v.
  7. Product Quality: You don’t always get what you pay for with an smart plug 220v, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an smart plug 220v is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining smart plug 220v information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding smart plug 220v is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

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FAQ:

Q: What is the best smart plug to buy?

A: The best smart plugs you can buy today. 1 1. Wemo WiFi Smart Plug. 2 2. TP-Link Kasa Smart Wi-Fi Mini Plug EP10. 3 3. Ring Outdoor Smart Plug. 4 4. Wyze Plug. 5 5. Lutron Caseta Dimmer Plug. More items

Q: What are the best TP-Link smart plugs?

A: Priced at just $8 per plug, the Kasa Smart Wi-Fi Mini Plug is one of the best smart plugs in terms of value. We’ve tested other smart plugs and smart home devices from TP-Link and found them to be safe, easy-to-use and reliable.

Q: Can you use a smart plug outdoors?

A: (You should never attempt to use a typical smart plug outdoors.) The KP400 has an operating-temperature range of -4 to 122 degrees Fahrenheit. It includes two outlets that you can control independently using the app or voice control (via Amazon Alexa or Google Assistant), and it’s easy to set up and use.

Q: Do smart plugs use Bluetooth or Wi-Fi?

A: Although some plug-in smart outlets use Bluetooth (or other wireless technology), most connect via your home’s Wi-Fi. Many Wi-Fi routers transmit using two wireless frequencies—2.4 GHz and 5 GHz. But all of the Wi-Fi–enabled smart plugs we tested are able to connect only via 2.4 GHz networks.