1. Easy To Out-Of-Reach Devices, Mounted On The Guide Rail, Convenient To Connect And Control Devices Far From The Switch 2. Keeps On For A While, Then Turns Off Automatically ,Inching Mode, Don'T Want To Stiffly Fumble In The Dark For The Way? Enable Inching Mode To Set A "On" Schedule For Your Corridor Light, And It Will Automatically Turn Off After Reaching The Preset Time 3. Voice Controls Your Home, Compatible With Alexa And Google Home. Wanna Turn Off The Light Immediately? Just Tell It To Do 4. Security Comes Before Everything, The Durable Flame-Retardant Pc Shell Provides The Maximum Safety For Connected Devices In Use 5. SONOFF 4CH R3 Multi-Channel Smart Switch With Automatic Locking And Independent Mobile Phone Remote Control Timing For Each Channel Specifications: 4CH R3 Working voltage: 100-240V Working current: less than equal 10A Control distance: unlimited Load power: Maximum 2200W/10A per channel Rated frequency: Wifi Control Type: Network Control Switch Type: Four-Receiver Remote Control Switch Colour:As Shown Material:ABS Package Contents: 1x Multi Channel Smart Switch