1Wireless, control for Xiaomi smart bulbs or lights through ZigBee. 2Portable, control can be implemented anywhere, can be used as a key doorbell. 3With SOS emergency call, guard and withdraw function. 4Radio frequency, 2.4ghz (2400-2483.5mhz). 5Wireless connection, for ZiGBee, please go for Google Play to download for ''Mi Home''.Item type:Smart WallSwitch Condition: 100% Brand: for Mijia Model: QBKG11LM Material: plastic Weight: Approx. 161g Color: As picture shownSize: Approx. 8.6x8.6x4.3cm/3.4x3.4x1.7in Wireless connection: for Zigbee Input voltage: 220V, 50Hz Maximum load: 2500W Operating temperature: -10 ~ + 40 Working humidity: 5% ~ 95% RH Options: zerofireswitchsingle button without neutral, zerofireswitchdouble button with neutral, single fireswitchsingle button without neutral, single fireswitchdouble button with neutral }1 x Switch1 x Screw bag