EV-DW4975 Vanishing Wireless Mini Door Window Contact. If you are looking for wireless sensors to use with your DSC alarm but are hesitant to use some of the other models because of their bulky size, this DSC 4975 "vanishing transmitter may be exactly what you are looking for.

This transmitter is the thinnest wireless door / window transmitter we've ever seen. While these will work to protect just about any opening, these are particularly well suited for windows. They are called "vanishing" because they just about do vanish when mounted on the window the profile is so slim.

 

Includes a long life pre installed coin cell lithium battery that is user replaceable. Battery life is estimated at 5 years under normal use. Also includes powerful contact magnet that allows up to a 3/4" gap distance. Dimensions are 2 1/4 in. x 1 in. x 3/16 in. (L x W x D)