Door Magnet Contact Switch Alarm

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Wireless Door & Window Contact

Item No.: BTD200-10
BTD200-10 is a door contact sensor designed to monitor irregular opening or closing of a door or a window. This accessory activates your alarm system when detecting an irregular activity.
Anti-theft for doors,windows and SOS
Launch frequency:433MHz

There are two ways for general criminals from the door into the house : First, steal the key of the owner, then open the door; Second, with the tools to pry the door. Regardless of the way in which the criminals enter, he must push the house door. Once the thieves push the door, the door and the door frame will be displaced, the door and magnet also produce displacement, (radio) signal immediately fired to the host, the host sounded the alarm sound and dial 6 preset phone number.