Master Lock 266D Window and Patio Door Lock with Alarm

Bad guys know they're being bad and do everything to conceal their behavior. If a bad guy wants to break into your home or business, this Master Lock window and patio lock will reveal their bad behavior in an unmistakable way. This adjustable locking security device features a pressure-activated, 110dB alarm while the intruder is still outside of your home, immediately alerting any occupants of the attempt. It automatically adjusts from 22-36in., so it will fit most windows or sliding patio doors. It also provides an obvious visual deterrent, since the word alarm is printed in bold block letters on the device. As either a stand-alone security device or in addition to your existing home security system, you'll have greater peace of mind. Battery included.