For more information videos and installation guides on the dsc alexor alarm system click herefor the alexor brand store simply placing one of the dsc alexor wireless glass break detectors close to a window will protect a whole room and multiple windows it is finely tuned to the shock and noise of breaking glass and will activate the alarm should an intruder force their way in though a window this is a useful addition to motion detectors for extra security based on the acuity glassbreak de