Find great deals for Ademco ADT Honeywell Wireless Glass Break Detector For Home Alarm System. Shop with confidence on eBay. Wireless Glassbreak Detector Installation Instructions. Glassbreak . Honeywell, FlexGuard and IntelliSense are registered trademarks of Honeywell. The Honeywell is a wireless glass break detector that is enhanced with the FlexGuard feature. All FlexGuard glass break detectors listen for not only the.