This is Wireless Door Entry Safety Security Sensor Alarm Bell. Doorbells feature elegant shaping￡? unique European-style designs￡? noble and graceful. Outer casing is made of quality PC material for shock-proofing and good dual-sided.                                    Features            New and high quality<br>Environmental economy￡? high temperature resistant￡? corrosion resistant <br>Convenience in installation <br>Jia Sheng wireless remote-control doorbell is one of the products of our factory developed utilizing advanced European ultrahigh freqency encrypting technology. We select quality imported components and make doorbells with imported Us high-precision facilities￡? and we have perfect after-sales services as well as guaranteed product quality<br> A doorbell is comprised of a transmitter and a receiver with the same encryption. The transmitter can be fixed to thedoor with dualsided foam adhesive￡? screws￡? etc.<br>Make surenot to fix it too close to metal articles￡? and avoid rainwater. It will not consume power in static state￡? battery will last one year (20 times/day)<br> Receivers are availablen DC type and AC type. Main unit utilizes quality music IC￡? dynamic peaker￡? producing pleasant sound<br>                                                            Specifications            Power    AAA 1.5V Battery (Not included)    <br>Sensor Type    Alarm    <br>Alarm Type    Sound    <br>Material    Plastic    <br>Color    White    <br>                                                            Package Includes            1 x 9801 Remote-controlled Door Alarm1 x Charger