Feature:1. 1. Smart APP/timing control: Smart Life/Tuya can directly control switch via Bluetooth. You can also configure the smart switch to turn all functions on and off according to your own schedule. For example, turn on the coffee machine before getting up.2. 2. Use the gateway to be smarter: Using the wireless gateway (only 2.4GHz WiFi is supported), you can remotely control the smart buttons anytime and anywhere, and enable voice control. Use with compatible for Google Assistant and Siri. This is a perfect home assistant. (The gateway needs to be purchased separatelyThe gateway needs to support the Bluetooth protocol)3. 3. Easy to install: The smart switch button can be used with almost any rocker switch and button on any device. Place it directly next to the rocker switch or button with sticker. No tools, simple operation.4. 4. Built-in replaceable battery: Built-in 3V CR123A battery, one can be used for half a year, long-term battery life, when the battery is dead, it can be easily replaced by opening the back cover.5. 5. Toolkit: The toolkit is equipped with mechanical arms of various lengths and shapes. This switch can change his finger type. Can adapt to more scenarios (need to be purchased separately)Specification:Size: 3.2 x 3.2 x 3.2cmCommunication protocol: BLE 4.2System support: Compatible for iOS 11 and above, Android 9.0 and aboveStall torque: 1.8 kgf-cmWorking temperature: -10-+45Smart Life/Tuya App: YesPackage List:Button List:1*ButtonToolkit list:5*Button arm2*Wood block Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-HAIGOUGOU shop