100 Decibel Door & Window Alarm Complete With Battery

(This product quite possibly saved my Mother's life after I installed one on her door last month and the activation of the alarm scared off a burglar attempting to break in to her home! Get several for yourself and your loved ones too!) This clever alarm has a piercing 100 Decibel sound and comes with the battery installed. Simply attach one side to your door or window frame and the other in line with the other half on the door or window. When the two are separated by someone opening door or window the alarm sounds. Simple On/Off switch lets you activate and deactivate the alarm as you like. Great for security anywhere you need to monitor your doors and windows. Buy several and place them around your house and property. Very unobtrusive and compact design. Thanks for your patronage.