SwitchBot Smart mmWave Radar Motion Sensor with Hub Mini, Bluetooth Presence Sensor with Dynamic Detection & Zone Positioning, Compatible with Alexa, HomeKit & Apple Home, 2-Year Battery Life

Motion & Presence Detection: Presence Sensor combines mmWave radar with light-sensing technology and PIR sensor to accurately detect subtle chest movements from stationary humans. Perfect for bathrooms, reading, or office use, it prevents lights from turning off unexpectedly and enables automated lighting.