Brown wireless opening detector for mounting on doors or windows. Reacts when the magnet is removed. Includes anti-tamper protection. Occupies an address in the 9000 system. Power supply: 1 x 3V CR123A lithium battery (included), radio frequency: 868MHz, operating temperature: -10 to +40°C. Color: brown. Dimensions: 75 x 30 x 20mm, magnet: 56 x 16 x 15mm. 2x 5mm spacers for the magnet housing and, as an alternative, a D 9 x 3mm ring magnet are included.