Fangrui Product Details Product Name: Power-off Memory Button Lamp Shell: Pc Flame Retardant Material Installation Method: Zero Fire Wire/single Zero Fire Universal Maximum Power: 1000w/circuit Working Voltage: Ac 100v-240v 50-60hz Installation Hole Distance: 120mm Size: 147*86*38mm Wireless Connection: Wifi 2.4ghz App: Tuya, Smart Life Timing Setting: App Setting Timing Control, Remote Setting On And Off Backlight Control: App Setting To Turn On Or Off The Backlight. Support: Power-off Memory Specifications: 1. App Remote Control: Control The Switch Anytime And Anywhere Through The Mobile Phone App. 2. Hands-free Voice Control: Use Alexa, Yandex Alice And Other Intelligent Voice Control. 3. Timer, Schedule And Countdown Functions: Intelligent, To Maximize Your Daily Life. 4. Child Lock: The Lock Function Is Designed To Prevent Misuse By Children. 5. Family Sharing Function: Create A Smart Home With Your Family. 6. Luxurious Glass Panel: Resistant To Deformation And Fading, Easy To Maintain And Clean. Package Included: 1*smart Switch