The Wireless Recessed Door Sensor Honeywell Compatible is a magnetic contact sensor that provides concealed protection for doors. If you want to have a wireless door sensor but don’t want it to be surface mounted, you can recess this one into your wooden door jam.  Since it’s wireless, it uses a lithium battery that usually lasts 2-5 years depending on frequency of use. So you won’t have to worry about constantly changing batteries.

Features:

• Includes self-contained transmitter and reed sensor
• Virtually disappears once installed
• Easy replaceable AAA Lithium battery
• 0.5” gap (transmitter to magnet)
• Features a tapered cylinder for easy and flush fit
• Dimensions: 0.75″ diameter x 3.0″ length