Radio opening detector for Smart Security System 700. For monitoring windows and doors. The built-in reed contact reacts to the removal of the included magnet (max. switching distance: 18mm). Incl. tamper switch. Radio frequency: 868MHz. Power supply: 1x 3V CR2032 lithium battery (included). Fastened using screws or adhesive pads (both included). Dimensions: 27 x 71 x 14mm (detector), 13 x 71 x 13mm (magnet).