Shelly BLU Door/Window Black

The Shelly BLU Door/Window is a Bluetooth sensor designed to detect the opening and closing of a door or window. It can also measure the tilt angle of a door or window that is being tilted or rotated. Additionally, it features a light sensor. Its functions include a long battery life, detection of door and window openings and closings, measurement of door and window tilt angles, light measurement, a beacon mode, and an encrypted mode.