Radio opening detector, brown, 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°C to +40°C. Color: brown. Dimensions: 30 x 75 x 22mm, magnet: 16 x 55 x 15mm. 2x 5mm spacers for the magnet housing and, as an alternative, a D 9 x 3mm ring magnet are included.