1、1.Remote Control.You can check the lights anytime anywhere with the app in your phone. 2、2.With Motion Sensor,it will turn on the lights for you when it detects you in the room. 3、3.With door and window sensor,lights turn on as soon as the door is opened. 4、4.Easy to setup. 5、5.Upgrade without changing lighting equipment. Title： Aqara Smart Wall Switch E1 ZigBee 3.0 Smart Home Wireless Key Light Switch Remote Control WiFi Switches Features： Remote Control.You can check the lights anytime anywhere with the app in your phone. With Motion Sensor,it will turn on the lights for you when it detects you in the room. With door and window sensor,lights turn on as soon as the door is opened. Easy to setup. Upgrade without changing lighting equipment. Specification： Product model:QBKG38LM (single fire single key) QBKG39LM (single fire double key) QBKG40LM (zero fire single key) QBKG41LM (zero fire double key) Product size:86*86*30.15mm Wireless connection: Zigbee 3.0 Rated voltage: Max 5A 220V～,50Hz Rated load:Min 3W, Max 1100W (single fire single key) Min 3W, Max1100W have two channels (single fire double key) Max 1100W, μ (zero fire single key) Max 1100W a total of two channels, μ (zero fire double key) Working temperature: 0℃~40℃ Working humidity: 0%-95%RH, non-condensing Package list： 1* Smart Wall Switch Note： 1) Aqara Smart Wall Switch E1 is newest from Xiaomi Ecological chain, can works with APP xiaomi mi home / aqara home / homekit etc ... 2) The wall switch can connect the wire, can control any bulb throught the wire ; while the wireless key cannot wired, only can control other devices by ZigBee 3.0 gateway 3)The E1 wall Switch can works with the zigbee 3.0 gateway (like Xiaomi gateway , aqara HUB  etc ...) 1* Smart Wall Switch Note： 1) Aqara Smart Wall Switch E1 is newest from Xiaomi Ecological chain, can works with APP xiaomi mi home / aqara home / homekit etc ... 2) The wall switch can connect the wire, can control any bulb throught the wire ; while the wireless key cannot wired, only can control other devices by ZigBee 3.0 gateway 3)The E1 wall Switch can works with the zigbee 3.0 gateway (like Xiaomi gateway , aqara HUB  etc ...)