Inexpensive Wireless Security Systems, Wireless Security Door Stop with Alarm, Single Room Privacy. Secures Your Room From Unwanted Intruders with Wedged Force and Loud Alarm. Used in Dorms, Hotels, Office, Apartments, Homes, Doors and Windows. Secure Your Window with the Motion Senser, If It Is Moved It Alarms. Watch who you buy from, the other suppliers ship from China. We ship from Amazon USA.