The Honeywell 7939WG-WH is a white, surface mount magnetic contact designed for Form A SPST (normally closed contact) wired alarm systems.
The two-screw terminal system makes for easy zone wiring.
The magnet and contact can be installed on any door or window frame. A 1 1/4" gap is observed, so be sure to mount the unit accordingly for optimal performance.
The device is flush mountable with screws or adhesive strips. The 7939WG-WH comes with screw caps.