SwitchBot Motion Sensor Pro - SwitchBot Alexa Security - Compatible with Google Home, Siri, and LINE - Smart Home, Remote Control, Easy Installation, Crime Prevention, Check with Smartphone, Alert Function About this product: 【3-in-1 Motion Sensor, Detects Even When Still】 Unlike conventional motion sensors, the millimeter-wave radar accurately detects the "presence of a person in a stationary state." This, combined with infrared and illuminance sensors, enables precise automatic control. For example, if you enter a dark room, the light will automatically turn on, and even if you remain still, the millimeter-wave radar will continue to detect your presence, so you don't have to worry about the lights turning off unexpectedly. Comfort is maintained even in places with little movement, such as toilets, studies, and workspaces. 【Cordless Design, Freely Installable Anywhere】 The cordless design and magnetic base allow for easy installation on walls and metal surfaces. It can be installed anywhere and is IPX5 waterproof, so it can be used safely in bathrooms and washrooms. Also, because it uses a sensor-based system that does not use a camera, it is safe for privacy. It is also suitable for monitoring family members. 【Energy-Saving Technology with a 2-Year Long-Life Battery】 The ultra-low power millimeter-wave radar technology allows for approximately 2 years of use with 2 AAA batteries. This significantly reduces the hassle of frequent battery replacements. Furthermore, the app will notify you when the battery level drops below 20%. You can use it for a long time with peace of mind, preventing the inconvenience of sudden battery failure.