Window alarms are an effective and affordable alarm that can be utilized to secure windows, even doors. Moreover, they can also be used to be an alarm for personal property to protect television sets, computers, cabinets, and videos. Operating it is very easy and convenient. Simply turn it on and the alarm will give out a sound that the unit is in great condition. Whenever the window is hit, cut, or knocked by any person, animal, or thing, an alarm will sound for a couple of seconds then reset. You can also choose to pick a mode, whether you want it to be high sensitivity that would detect a little vibration or low sensitivity that would only response at a stronger vibration.