The SONOFF DUALR3 is a 2-output-channel Wi-Fi switch that installs inside a standard electrical enclosure to give remote control of two separate circuits. In addition to on/off switching, it measures and reports real-time energy consumption through the eWeLink app, allowing users to monitor electricity usage and estimate costs directly from their smartphone.

The switch supports RF 433MHz control, enabling use with any compatible 433MHz remote in parallel with the app. It connects to Wi-Fi via IEEE 802.11 b/g/n at 2.4 GHz, works with Amazon Alexa, Google Assistant, and Samsung SmartThings, and includes overload protection. Timers — countdown, single, and scheduled — continue to operate even when the internet connection is unavailable.

Key Features

• Two independent output channels
• Built-in energy monitoring via eWeLink app
• Remote on/off control from iOS and Android
• Countdown, single, and repeat timer scheduling
• Overload protection
• RF support: any 433MHz control
• Works with Amazon Alexa, Google Assistant, and Samsung SmartThings
• Wi-Fi IEEE 802.11 b/g/n 2.4 GHz (2400–2483.5 MHz)
• Security: WPA/WPA2; Encryption: WEB/TKIP/AES
• Enclosure: PC V0, IP20 protection
• Certifications: CE/FCC/RoHS/TUV

Product Benefits

• Energy monitoring lets users quantify exact consumption per circuit and calculate electricity costs over time
• Overload protection automatically cuts power if the rated load is exceeded, protecting connected appliances
• RF 433MHz support means the switch can be operated by a physical remote even without a smartphone
• TUV certification adds independent safety verification beyond CE/FCC/RoHS

Technical Specifications

• Body Colour: White
• Enclosure Material: PC V0
• Protection Rating: IP20
• Operating Systems: Android and iOS
• Voice Assistant Compatibility: Amazon Alexa, Google Assistant, Samsung SmartThings
• Wireless Frequency: IEEE 802.11 b/g/n 2.4 GHz
• Wireless Standard: IEEE 802.11 b/g/n 2.4 GHz (2400–2483.5 MHz)
• Security Mode: WPA/WPA2
• Encryption Mode: WEB/TKIP/AES
• RF Support: Yes, any 433MHz control
• Operating Temperature Range: -10°C to 40°C
• Input Voltage: AC 100–240V 50/60Hz
• Output Voltage: AC 100–240V 50/60Hz
• Resistive Load: 3300W/15A total; 2200W/10A per channel
• Maximum Load per Channel: 10A/2200W
• Motor Load: 10–240W/1A
• Voltage Range: 100–240V AC 50/60Hz
• Certifications: CE/FCC/RoHS/TUV

Why You'll Love It

• Energy cost tracking is displayed in the app — useful for identifying high-consumption appliances or circuits
• RF 433MHz compatibility provides a backup control method independent of internet connectivity
• Timers that work offline maintain schedules during router outages without any manual intervention
• TUV certification provides additional confidence for use in fixed electrical installations