【Light turns on when you arrive – off when you leave】Pair the SwitchBot mmWave Presence Sensor with the SwitchBot Bot for fully automatic light control: the radar sensor detects your presence and the Bot presses the light switch automatically – no rewiring, no renovation. Enter the room and the light turns on. Leave and it switches off after an adjustable delay. 【mmWave Radar – detects you even while sitting or lying down】Unlike conventional PIR motion sensors, the mmWave radar sensor also detects stationary people – while reading, working at a desk, or sleeping. No more accidental switch-offs because you didn't move. Reliable presence detection around the clock. 【SwitchBot Bot – makes any existing switch smart】The Bot simply sticks onto your existing light switch, coffee machine, or any device with a physical button. It controls the switch mechanically via Bluetooth – no electrician needed, no renovation. Works with toggle switches, rocker switches, and push buttons of all kinds. 【Save energy effortlessly – never forget a light again】Left the hallway light on? Bathroom light burning all night? With this set, that's a thing of the past. The presence sensor reliably detects when a room is empty, and the Bot switches the light off automatically. Save electricity without having to think about it. 【Wireless & battery-powered – installed in minutes】Both devices are completely wireless. The presence sensor has a battery life of up to 2 years; the Bot is powered by a CR2 battery. Simply attach with the included adhesive pad – no drilling, no tools. Set up via the SwitchBot App in just a few minutes. 【Wide compatibility – Alexa, Google, Siri, SmartThings & Matter】Bot supports: Alexa, Google Assistant, Siri Shortcuts, IFTTT, SmartThings, and LINE Clova (hub required). The Presence Sensor supports: Alexa, Google, IFTTT, SmartThings, and Matter (hub required). Both devices can be linked via the SwitchBot App and integrated into existing smart home systems. 【Note: Wi-Fi remote control requires a SwitchBot Hub】This set works locally via Bluetooth. If you want Wi-Fi remote control – e.g. controlling devices from away or using voice assistants – a SwitchBot Hub (sold separately) is required. The SwitchBot Bot also supports HomeKit via Matter with the Hub 2 (2nd generation) – add it directly to Apple Home., Manufacturer: Wonderlabs