SwitchBot Smart Plug Mini 15A(4 Pack) with Smart mmWave Radar Motion Sensor, Bluetooth Presence Sensor with Dynamic Detection & Zone Positioning, Compatible with Alexa, HomeKit & Apple Home via Hub

Battery Design & Flexible Installation: Equipped with a long-lasting battery, this sensor frees you from power cables and can operate up to 2 years on a single charge. The magnetic base allows flat placement, wall mounting, and adjustable detection angles, making it ideal for bathrooms, living rooms, studies, and other areas throughout your home.