The Honeywell 5811 is a super sleek and thin door/window contact that is only 1/4" wide. The 5811 virtually disappears when installed and blends with any decor, making it ideal for applications where aesthetics are critical such as ornate doors, casements and double-hung windows. It's built in Reed switch provides a single zone of protection and installs easily on doors or windows with the included mounting hardware or double-sided adhesive tape. The magnet and battery are included.
Sleek design virtually disappears
Easy-to-open case requires no special tools
Case tamper protection
Ideal for double-hung windows
Includes user replaceable, long-life lithium 3V batteries