X10 Security System DS12A Door Window Sensor

BRAND NEW but OLD STOCK. X10 brand model number DS12A. For use with the X10 wireless security systems. Sets off the alarm when a protected door or window is opened. Requires 2 AAA batteries (not included) which can provide up to 1 year of operation. For indoor use only. RF transmission range allows it to be placed up to 100 feet from the security system console. In real world conditions, it would be about half that. Color is white. Mounting screws and double sided foam tape for the magnetic contact is included. You can view the instructions online in PDF format by clicking here. Shipping weight for one: 4 ounces. This is the X10 brand door/window sensor model DS12A for use with any X10 wireless security system base receiver (PS561, SC1200, or DC821) or can be added to any X10 wireless system (DS7000, SC1200, DC8700, SS5400, SS5402). Also works with some of the Radio Shack wireless security systems. When a door or window is opened, the sensor sends an RF signal back to the security