Double the Protection in One Device. Ideal for those installations where glassbreak detectors are not recommended. Not only can it detect the impact caused by breaking glass or forced entries, it can also detect openings and closings. That's double the protection in one device. With the adjustable sensitivity, each installation can be fine-tuned to ensure reliable coverage without false alarms. The EV-DW4927 is built with reliable 433 MHz technology and is compatible with all current DSC wireless receivers. Quicker Installations The EV-DW4927 includes doublesided tape for quick and easy mounting to virtually any surface. Also helping to make installations as effortless as possible is the easyto-open case that provides access to the battery and allows sensitivity adjustments to be made without using tools. With the EV-DW4927 you get two functions in one. By mounting the device on a window frame and the supplied magnet on the window, the alarm system is able to detect the shock produced by a forced entry as well as report when the window is opened or closed. Programming Flexibility To ensure flexibility, the easy-toprogram EV-DW4927 features two separate serial numbers: one for the shock detection function and the second for door/window contact operation.