Ajax DoorProtect Plus Black Combined door contact and vibration dectector Installation: Indoors Activation threshold: Small Magnet – 1 cm Up to 1200m in an open space (in a perfect environment) Operating frequencies – 868.0 – 868.6 MHz Power supply: CR123A battery (pre-installed) Battery life: up to 5 years Dimensions: Diameter – 20 mm, Height – 90 mm
