ELK 6023 Two-Way Wireless Recessed Door Sensor, White

Wireless Recessed Door Sensor for discreet home security. This flush-mount device installs into a 3/4" hole in wooden door jambs and remains virtually invisible when the door closes. Features two-way wireless technology with signal acknowledgment, extended range, and reliable battery performance. Includes built-in tamper detection. Available in white and brown finishes. Perfect for wood and vinyl doors.