The SONOFF 4CHPROR3 is a 4-gang Wi-Fi smart switch that adds RF 433MHz remote control to the standard 4CHR3 feature set, making it controllable via RF transmitter even without a network connection. It supports three distinct switching modes per channel: self-locking (standard on/off), interlock (opening one channel automatically closes the others), and inching (channel opens then auto-closes after 0.5–3600 seconds).

Like the 4CHR3, it connects via IEEE 802.11 b/g/n at 2.4 GHz and is managed through the eWeLink app on Android and iOS. Voice control is available through Amazon Alexa, Google Assistant, and Samsung SmartThings. Timer scheduling (single, repeat, and countdown) operates independently of network availability. Device sharing allows other eWeLink accounts to control the switch.

Key Features

• Four independent output channels, each rated at 10A/2200W
• Total rated load: 40A/8800W
• Self-locking mode: independent on/off for all 4 channels
• Interlock mode: opening one channel closes the other three simultaneously
• Inching mode: channel opens then auto-closes after 0.5–3600s
• RF support: any 433MHz control
• Remote on/off via eWeLink app (iOS and Android)
• Timer scheduling: single, repeat, and countdown
• Device sharing with other eWeLink accounts
• Voice control: Amazon Alexa, Google Assistant, 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

Product Benefits

• Interlock mode is purpose-built for motor or actuator control where only one direction can be active at a time
• Inching mode enables automatic gate or door actuators that must close after a fixed period
• RF 433MHz support allows control from a physical remote without relying on the internet or smartphone
• 40A/8800W total load capacity accommodates heavier combined loads across all four channels

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
• RF Support: Yes, any 433MHz control
• Input: AC 100–240V 50/60Hz
• Output: AC 100–240V 50/60Hz
• Max. Load per Channel: 10A/2200W
• Max. Total Load: 40A/8800W
• Inching Auto-Close Range: 0.5–3600s
• Voltage Range: 100–240V AC 50/60Hz
• Certifications: CE/FCC/RoHS

Why You'll Love It

• Three switching modes (self-locking, interlock, inching) cover a wide range of home automation scenarios in a single device
• RF 433MHz allows the switch to be included in existing 433MHz smart home setups without replacing existing remotes
• The included RF remote control makes manual operation straightforward for users who prefer not to use the app
• Timers that operate offline ensure reliability for time-critical switching tasks even during network downtime