Interlogix TX-1510-01-1

319.508MHz, 225mAh, 15.6g, grey The DesignLine Recessed Door Contact from Interlogix is the industry’s finest supervised, recessed door contact. Hidden within the door frame, the DesignLine contact is ideal, especially when a discreet sensor is required. The contact uses a replaceable lithium battery that lasts up to five years under normal usage and comes with a standard flush-mount and a flanged top.