AQara Smart Wireless Switch is a low-energy, simple and portable one-key device. It can control various smart devices, such as smart wall light, socket, intelligent curtain, etc. You can remotely control switch on/off via ''Mi Home'' App from anywhere. It can also be used as a doorbell. Convenient to use. What is more, the adhesive tape enables it to put or stick on any place you need. Main Features: - A compact device that allows you to control your home electronic devices from anywhere, make life easier and smarter. - One key to control, easy operation. - Can be used as the doorbell. - Can be used as the emergency call button. - Defending and withdrawing defense. - Portable, small size, come with double-sided adhesive tape, easy to install. - Built-in 1pc CR2032 cell battery, low-energy. Specification: Working temperature: -10 - 60 Deg. C Working humidity: 0 - 95pct Battery: built-in 1 x CR2032 cell battery Designed to fit everywhere. No wiring required. The minimal design allows you to place it anywhere or attach it to a surface with a sticker. Works with other HomeKit-enabled accessories in Apple Home app to make your life easier. * Aqara Hub is required to enable this product to work with HomeKit technology.