Sonoff Dual (R2) WiFi smart relay switch with 2 channels

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Sonoff Dual is a smart switch relay, 2-channel version of Sonoff’s via Internet controllable timer switch product line.

SKU: SON-REL-DUA Category:
EAN: 6920075700978


Sonoff Dual is a smart switch relay, 2-channel version of Sonoff’s via Internet controllable timer switch product line. WiFi-equipped smart relay, that after wired to an electric cable you can close or break the circuit with thus turning ON / OFF the device connected to the same electric cabel. 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 physical buttons. 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.

NEW (2018/11/17): latest v3.5.4 eWeLink app version and latest firmware supports (with standard software) impulse switch mode (inching mode), you can create a setting where turn OFF happens automatically after a required length of time.

Product features:

  • Remote ON / OFF – Anytime, anywhere, from now on you can turn all your appliances on and off remotely.
  • 2-channel version – 2 relays in 1, you can control two circuits with one device
  • 2 channels controlled independently from smartphone app
  • Mobil App – free iOS 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
  • No physical ON / OFF switch, only button serves connecting to WiFi.


Additional information

Weight 0.086 kg
Dimensions 11.4 × 5.2 × 3.2 cm
Product type

smart relay



Number of electric gangs controlled


Momentary switch (Inching)


Physical switch


DIN rail compatible

yes, with Sonoff DR adapter (not included)



433MHz RF remote controllable


Remotely controllable via internet


Voice control

Amazon Alexa and Google Assistant compatible

Power meter


Schedulers, timers

yes (single time, schedule, timer/countdown)

Smartphone app

yes, free app: eWeLink (Android, iOS)


Amazon Echo, Echo Dot, Amazon Tap, Google Home, Google Nest, IFTTT


90-250V AC, compatible with Hungarian 230V

Maximum power output

3500W (16A) per two circuits, 2200W (10A) per one circuit

WiFi wireless standard

802.11 b/g/n (2.4GHz)

WiFi security mechanism


Operating temperature range

0-40 ℃

Supported humidity range


Brand / Manufacturer



CE and RoHS certificates:


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