Wireless Alarm System, Brand Name : Fangda

We are offering FD-207 Telephone-connection Wireless Intrusion Alarm system.
Door contact adopts wireless transnittance. It should be about 50 meters high from wide area. The side of the light of the Sender MUST BE pointing to the Magnet, the two parts SHOULD BE touching each other. Distance between Senderand Magnet MUST NOT be longer than 5 CM, and should be as near as possible.
The magnetism and emitter should face to face. If you want to install them on the door or window, you can use two-side-sticker. The distance between magnet and emitter is less than 0.3 cm. If the distance is more than 0.5 cm, emitter will send digital alarm at once. Then alarm will give out voice and call at the phone numbers stored.
Use 12 V battery and the life-time can reach half a year. If the distance reduces obviously, you should change the battery. Please pay attention to the polarity when you are changing battery.