This is a new product which is produced by the import elements, it uses the sensor of reed switch and the technology of wireless remote control. The capability is steady, and convenience to use. It's a full-new product for protection and security. It's the ideal choice to guard against thefts in house, cars and other valuable wealth's safety, etc. Using method: open the battery board, distinguish anode and cathode, put into 3 x AA batteries ( in order to prolong the life of the product, suggest to use alkaline batteries), and then cover the board; B: put the switch onto ''ON''; C. Wireless magnetic door meet magnetic stripe; D: when the switch disjoined (under the defense), it will send out 120 dB warning sound, until it is stopped by using the remote control, or fold the magnet strips; E: when the volume become low obviously, please change the battery immediately. If you do not use it in a long time, please take off the battery;