DSC EV DW4927 wireless shock sensor with built in door / window contact. This wireless shock sensor is perfect for situations where glass break detectors are not recommended. It can be used to detect the impact caused by breaking glass or forced entries, and also has a built-in reed switch and ships with a magnet so it can be used to detect openings and closings.
Compatible with all DSC 433 mhz receivers. The EV-DW4927 is powered by a replaceable lithium battery good for 5-8 years under normal use. Dimensions: 2 15/16" x 1 11/16" x 1" (75 mm x 43 mm x 25 mm)