Description: Timing control: Directly control the switch through Bluetooth. You can also configure an intelligent switch according to your plan to turn on and off all functions. For example, turn on the coffee machine before getting up. Smart: With the wireless gateway (only 2.4GHz Wi-Fi is supported), you can remotely control smart buttons anytime, anywhere, and enable voice control. This is the perfect family assistant. Easy to install: The intelligent switch button can be used with almost any rocker switch and button on any device. Place it directly next to the labeled rocker switch or button. No tools are needed and the for operation is simple. Replaceable battery: built-in battery, which can be used for half a year, with long battery life. When the battery is exhausted, open the back cover to replace it easily Tool kit: The tool kit is equipped with mechanical arms of various lengths and shapes. This switch can change his finger type. Specification: Material: Plastic. Color: As shown. Size:Approx. 3.2 x 3.2 x 3.2cm/1.25x1.25x1.25 inches. Communication protocol: BLE 4.2 Stall torque: 1.8 kgf-cm Working temperature: -10-+45℃ Smart Life/Tuya App: Yes Package Includes: Button List: 1 Piece Button. Toolkit list: 5 Pieces Button Arm. 2 Pieces Wood Block.