Features : *Battery operated (Battery not included)  * Compatible with numerous wireless transmitters  * Battery saving circuit  * Variable detection range of 12m on each side  * Form C alarm output and tamper output  * Low current draw  * Double conductive shielding  * Advanced temperature compensation  * Limited detection range function  * Size judging function to avoid false alarms  * Attractive and slender design .      Model : OP862-01-BX-80NRC      Manufecturer :  OPTEX