controls one work status, enable interlock to turn on 1 channel and turn off other channels simultaneously.[Automatically Turns Off] Don& 39;t want to stiffly fumble in the dark for the way? Enable inching mode to set a & 34;on& 34; schedule for your corridor light, and it will automatically turn off after reaching the preset time.[Voice Controls Your Home] Compatible with Alexa and Google Home. Wanna turn off the light immediately? Just tell it to do.[Easy to Out-of-Reach Devices] Mounted on the guide rail, convenient to connect and control devices far from the switch.[Safe to Use] The durable flame-retardant PC shell provides the maximum safety for connected devices in use.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. 433MHz RF Controller is not included. Specifications:Model: 4CH PRO R3Material: PC V0Voltage: 100-240V AC, 50/60Hz (DC: 9-23V)Max. Load: 10A/2200W/Gang, 40A/8800W/TotalWireless Frequency: WiFi 2.4GHz Wireless Standard: IEEE802.11 b/g/n, 2.4GHz (2400M-2483.5M)Security Mode: WPA/WPA2Compatibility: Compatible with Android 4.1 or later, iOS 9.0 or laterWiring Way: N and LightWire Diameter: 0.5-1.5mm (24-14AWG)Gang: 4433MHz Remote Control: YesDry Contact: YesAC Input: YesDC Input: Yes3-Month Operation Records: YesInterlock Mode: AppInching Mode: AppItem Size: 14.5*9*3.4cm / 5.7*3.54*1.33inItem Weight: 202g / 7.12ozPacking List:1 * Smart Switch1 * Screwdriver 1 * User Manual