AJAX (7063.03.WH1) DoorProtect, Wireless Opening Detector - White Wireless opening detector that notifies of first signs of room intrusion by means of a broken door or window. It can be mounted on all types of doors including a metal base. Indicates armed/disarmed mode with a built-in LED Communication range with central unit — up to 1,200 m in an open space Two-way communication between devices Security: Self-adjusting RF output power — up to 20 mW, Block encryption based on AES algorithm, Detector polling period — 12-300 s Protection against fraud, Jamming detection, Tamper-resistant Size & Weight: 20 × 90 mm, 29g Battery: CR123A battery, 3 V, Operates up to 7 years without replacement 1 Year Official Warranty.