2" Surface Mount Magnetic Alarm Contact Switch, Window Door Sensor, White with Adhesive

2" Surface Mount Magnetic Alarm Contact Switch, Window Door Sensor White A magnetic alarm contact switch that can be used as a door sensor or window sensor. This switch detects when a window or door has been opened so that video recording can be triggered on a surveillance DVR or network IP camera. It can be mounted using the mount screws or the pre-applied adhesive. Mount Screws Included Adhesive Tape Included Wire Range for Terminal: 18 to 24 gauge AWG Dimensions: 2 x 0.375 x 0.28 (Length x Width x Height in inches)