Fangrui Product Details [wifi+bluetooth Dual Mode] Connect To Faster. The Connection Speed Is 2 Times Faster Than Only Wifi (wifi Models Have This Function, Zigbee Does Not Have This Function) [40a] It Can Be Used For , Air Conditioners And Other High-power Equipment. Note The Maximum Power. [requires Zero Line] Need To Have A Zero Line Before It Can Be Used, High- Are And More Stable [offline Function] When The Device Is Offline, The App Remind The Device To Be Offline After 30 Minutes [app Remote Control] Control The Switch Anytime, Anywhere Through The Mobile App [voice Control] Use With For And Home, Tmall Genie [set Timing] Turn On And Off The Connected Device At The Specified Time. Schedule The Living Room Fan To Turn On In The Morning, Or Schedule Your Childrens Lights To Turn Off To Let Them Know Its Time For Bed. [3 Kinds Of Restart Status] Default On Or Off, Or Memory Status [backlight Option] You Can Set The Status Of The Backlight To That Switching On And Off The Light During Rest Not Affect The Rest (wifi Models H