You never know when you might be the victim of a home invasion. Protect yourself with this simple, cheap Door Alarm - a great alternative to expensive home security systems. It's simple to install, and you'll be able to scare off would-be intruders with a deafening screech from this high-powered alarm.
There are only two pieces you need to deal with - the alarm and the magnetic sensor. Both have adhesive pads that allow you to place this Door Alarm on any door or window. Insert two AAA batteries into the alarm, install both next to each other, and you're all set. When you're ready to arm the alarm, switch it on and leave it alone. If anyone tries to open the door or window, the contact sensor will be tripped and they'll be floored by an ear-splitting screech that will send them running.