Sonoff POW (R3) or POWR3 is a smart switch relay, and R3 is the 2021 version with increased high power capacity. POW R3 supports max. 25A / 5500W, and is a WiFi-equipped smart switch relay, with power meter. Temparature and humidity sensor pairing is NOT supported. POW R3 features a built-in overload-protection, protects the connected device.
The smart relay is remotely controllable via Internet and iOS (Apple) or Android smartphone App, and you can set scheduled turning ON / OFF. The device has a physical button too. Share remote control in the App with your family. Ideal solution to smart control home appliances, that don't need to operate all the time and can be turned ON / OFF periodically (e.g. aquarium air pump). By using the smart switch relay you can remotely turn ON any of your appliances even before you are at home and you can conveniently set a scheduled turn OFF to save energy and cost.
Features real-time power metering, daily and monthly statistics are displayed in the mobile app. New R3 version supports downloading the consumption data to your smartphone. The smart switch relay provides help not only with remote and scheduled turning ON / OFF but helps to understand and optimize your power consumption too.

Highlights:

25A/5500W Highest - Output Power POWR3 has the highest output power to make your high-powered devices smart, or as a single room-meter to measure power consumption.
Measuring Power - Consumption Keep track of active power, current and voltage of your appliances on App
Overload protection - Once an abnormality was detected, the power will be cut off to avoid device damage and danger.
One-tap switch on/off remotely - POWR3 can cut off power wherever you are that can ensure the safety of your appliances and save on hidden electricity bills
Voice Control - Compatible with Amazon Alexa, Google Assistant, SmartThings, and Alice. Just speak out your command, the smart device can do on/off as you say.

Product features:

Remote ON / OFF – Anytime, anywhere, from now on you can turn all your appliances on and off remotely.
High capacity device, support up to 25A / 5500W
Mobil App – free and és Android mobil App: eWeLink
Sync status – Check actual relay status (turned ON or OFF) with the mobile App
Timer – Various timer functions: single time, scheduled turn on/off, countdown/timer, loop.
Share control – Control the device together with your family
Scene – Turn ON / OFF a gang of devices with one tap
Smart scene – Triggered ON/OFF by temp, hum or other environmental sensors
Compatibility – Works perfectly with Amazon Alexa, Google Assistant, IFTTT and Google Nest
Real-time power metering – displays actual consumption in App
Period consumption metering – stop-watch metering function, consumption is metered from start to stop
Power consumption statistics - daily and monthly total consumption statistics displayed in the App (monthly periods, over last 100 days)

Technical data sheet

Weight     0.091 kg
Dimensions     16.2 × 12.2 × 4.55 cm
Colour     white
Product type smart WiFi relay with powermeter
Electric gangs controlled 1
Switch/ switch relay     yes
Power meter     yes
Dimmer/light controller     no
DIN rail compatible     yes
Physical on/off button     yes
Inputs for external switch     no
Momentary switch     yes
Device power supply     90V-250V AC
Wiring     230V AC (live and neutral)
Controlled output     100V-240V AC
Maximal capacity     25A / 5500W
Overheat protection     no
Surge protection     yes, adjustable min. and max. performance, max. performance and max. power for automatic off
Controllable from internet yes
WiFi connection     yes
WiFi standards     802.11 b/g/n (2.4GHz)
RF/ radio control (433.92MHz)     no
Zigbee connection     no
Cloud mode     default mode is connecting to the eWeLink cloud
Local area network mode     yes, if the connection with the eWeLink cloud is disconnected, limited features
REST API support     no
MQTT support     no
Supported integrations     Amazon Echo, Echo Dot, Amazon Tap, Google Home, Google Nest, IFTTT (IFTTT integration with subscription, Premium feature)
Manufacturer smartphone app     yes, free app: eWeLink (Android, iOS)
Web admin interface     on/off mode (only with subscription, Premium feature)
Notification functions     eWeLink app notification on smartphone
Voice control     Amazon Alexa and Google Assistant compatible
Scheduling timer     yes, 8 timings on the device in offline mode, (loop control supported), any further timing can be run from the cloud in online mode
History     yes:on/off history in the app, 100 days of metering data in the app, downloadable CSV metering data history
Temperature range     -10ºC – 40ºC
Humidity range     5-90%