1、Wireless, control for Xiaomi smart bulbs or lights through ZigBee. 2、Portable, control can be implemented anywhere, can be used as a key doorbell. 3、With SOS emergency call, guard and withdraw function. 4、Radio frequency, 4ghz (2400-2485mhz). 5、Wireless connection, for ZiGBee, please go for Google Play to download for ''Mi Home''. 1 x Switch1 x Screw bag Item type: Smart Wall Switch Condition: 100% brand newBrand: for Mijia Model: QBKG11LM Material: plasticWeight: Approx. 161gColor: As picture shownSize: Approx. 8.6x 8.6x 4.3cm/ 3.4x 3.4x 1.7inWireless connection: for ZigbeeInput voltage: 220V, 50HzMaximum load: 2500W Operating temperature: -10℃ ~ + 40℃Working humidity: 5% ~ 95% RH Options: zero fire switch single button without neutral, zero fire switch double button with neutral, single fire switch single button without neutral, single fire switch double button with neutral