Each smart switch has 4 gangs that can be used to control lights and other home appliances at the same time in four areas of your home. Features: Remotely control connected lights or devices via APP. 3 working modes with self-locking, interlock and inching mode for even remote control garage door and roller blinds. Support scheduling a timer to make devices automatically start and stop to work. Customize smart scenes to make the device connected with the switch to trigger other devices. Share the control permission of devices to other accounts to control together. Check real-time ON/OFF status of devices on your mobile phone. Power on state allows users to set the On/Off/Keep status for the connected device before power failure and ensure it remains the arranged status after power restoration. Note: 1. The device only works with 2.4GHz WiFi. 2. If the router is working in dual-band (2.4GHz & 5GHz), please upgrade the eWeLink app to V4.0.0 or above. 3. The Pairing will fail if a wrong WiFi password is input. 4. The device shall get close to router for a good transmission signal condition while pairing. 5. RF control is only for 4CH PRO R3. There is a major difference between 4CHR3 and 4CHPROR3, which is 4CHPROR3 is designed with an additional function for RF control. The function is purposely adopted to make you turn on/off the device connected with 4CHPROR3 via the RM433 remote controller. Specifications: Model: 4CH R3 Enclosure Material: PC V0 Color: White Voltage Range: 100-240V AC 50/60Hz Max. Load: 10A/2200W/Gang, 16A/3500W/Total Wireless Frequency: WiFi 2.4GHz Wireless Standard: IEEE802.11 b/g/n, 2.4GHz(2400M-2483.5M) Security Mechanism: WPA/WPA2 Compatibility: Compatible with Android 4.1 or later, iOS 9.0 or later Wiring Way: N and Light Gang: 4 433MHz Remote Control: No Dry Contact: No AC Input: Yes DC Input: No Operating Temperature(recommended): -10C-40C(14F-104F) Operating Humidity: 5%-95%RH, Non-condensing Item Size: 14.5*9*3.4cm / 5.7*3.54*1.33in Item Weight: 188g / 6.63oz Package Weight: 218g / 7.68oz Packing List: 1 * Switch Controller 2 * Hook 1 * Screwdriver 1 * User Manual