Shelly BLU Door Window ZB (White) Bluetooth Sensor Designed To Detect The Opening And Closing Of A Door Or Window

The Shelly BLU Door/Window ZB is a smart Bluetooth andZigbee sensor for doors and windows that detects open/close status and measureslight levels. Strengthen security, automate lighting, ortrack access. The compact design installs easily on doors, windows, gates,garage doors, and more – blending into any interior. Features: Dual Connectivity: Bluetooth 5.