Securing rooms from unauthorized entry couldn't be easier. The GE Personal Security Door Stop Alarm requires no wires or complicated installation and is powered by a single nine-volt battery (not included). Simply place the pressure-sensitive door stop alarm at the base of any door, and the device will emit a powerful 120-decibel alarm when the door is opened. The GE Personal Security Door Stop Alarm is extremely compact, so it's convenient enough to take anywhere. With this handy gadget, you'll be able to secure your hotel room, dorm room, apartment or any room in your home. The compact, portable design makes it the perfect travel companion. Easily store in a travel bag, suitcase, briefcase or backpack for added protection anywhere you go. Setting up the door stop alarm is as easy as sliding the power switch to the 'On' position and placing the unit at the foot of the door you want to monitor. The alarm requires no wiring, drilling, or complicated installation, and it is powered by a single nine-volt battery (not included). A battery indicator light warns you of a low battery, so you'll always know when it's time for a replacement. The rubber base pad provides traction on wood, tile, vinyl and carpet. With secure gripping ability, the alarm can function as a door stop that prevents a door from being opened. The 120-decibel alarm warns you and your neighbors of a forced entry, and it's enough of a deterrent to scare off most would-be intruders. The alarm is activated when pressure is applied to the top of the device when the door is opened. A sensitive trigger switch prevents intruders from bypassing the alarm by sounding the siren no matter how far the door is opened.