The SONOFF 4CHR3 is a DIN-rail-mountable 4-gang Wi-Fi switch designed to integrate into a home's electrical installation and provide remote control of four separate circuits. It connects to a 2.4 GHz Wi-Fi network using the IEEE 802.11 b/g/n standard and is managed through the eWeLink app on Android and iOS.

Each of the four output channels can be switched on or off independently from the app, from a physical button on the device, or through voice commands via Amazon Alexa, Google Assistant, or Samsung SmartThings. Timer functions — including single, repeat, and countdown timers — work even when the network is unavailable. Device sharing allows multiple users to control the same switch from separate accounts.

Key Features

• Four independent output channels, each rated at 10A/2200W maximum load
• Total rated load: 16A/3500W
• Remote on/off control via eWeLink app (iOS and Android)
• Single, repeat, and countdown timer scheduling
• Device sharing with other eWeLink accounts
• Works with Amazon Alexa, Google Assistant, and Samsung SmartThings
• Wi-Fi 2.4 GHz, IEEE 802.11 b/g/n (2400–2483.5 MHz)
• Security: WPA/WPA2; Encryption: WEB/TKIP/AES
• Enclosure: PC V0, IP20 protection
• Certifications: CE/FCC/RoHS

Product Benefits

• Independent channel control means each of the four circuits can be scheduled or toggled without affecting the others
• Timer functions that work offline ensure lights or appliances still switch at set times during internet outages
• Device sharing lets family members or colleagues control the switch without sharing account credentials
• Compatibility with Alexa, Google Assistant, and SmartThings allows integration into existing smart home ecosystems

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: Wi-Fi 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
• Working Temperature Range: -10°C to 40°C
• Input: AC 100–240V 50/60Hz
• Output: AC 100–240V 50/60Hz
• Max. Load per Channel: 10A/2200W
• Max. Total Load: 16A/3500W
• Voltage Range: 100–240V AC 50/60Hz
• Certifications: CE/FCC/RoHS

Why You'll Love It

• One switch replaces four separate smart switches, reducing wiring complexity and cost
• Countdown and repeat timers are useful for specific scenarios like turning off a water heater after a set duration
• The PC V0 flame-retardant enclosure meets standard electrical installation safety requirements
• eWeLink app setup is straightforward: connect to Wi-Fi, add the device, and the switch is ready to control remotely