Designed to detect opening or closing of doors/windows and report them immediately, triggering home automation scenarios accordingly. Also can measure tilt angle and luminosity. Detects and reports opening or closing of doors/windows Measures tilt angle and luminosity Battery 1 x 3 V CR2032 – included Battery life – up to 5 years Easy control through the Shelly Smart Control app, BTHome protocol or various platforms Can be integrated into automation scenarios and scenes *To use this device with the Shelly Smart Control app, a gateway is necessary. Compatible gateways are Shelly BLU Gateway, or any Shelly Plus, Pro or Gen3 device (excluding sensors).