rooms from self-appointed entry could n't be easier. The GE Personal Security Door Stop Alarm no wires or complicated installation and is powered by a sole nine-volt battery -LRB- not included -RRB-. Simply the pressure-sensitive door stop alarm at the base of any door, and the device will emit a muscular 120-decibel alarm when the door is opened. The GE Personal Security Door Stop Alarm is extremely, so it 's favorable decent to take anywhere. With this ready to hand gadget, you 'll be to promised your hotel room, dorm room, apartment or any room in your home. The tight, man-portable design it the faultless travel companion. Easily in a travel bag, suitcase, briefcase or backpack for added protection anywhere you go. up the door stop alarm is as user-friendly 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 no wiring, drilling, or complicated installation, and it is powered by a sole nine-volt battery -LRB- not included -RRB-. A battery indicator well-lighted you of a under battery, so you 'll always know when it 's time for a replacement. The rubber base pad traction on wood, tile, vinyl and carpet. With promised gripping ability, the alarm can as a door stop that prevents a door from being opened. The 120-decibel alarm you and your neighbors of a involuntary entry, and it 's decent of a deterrent to scare unsatisfactory most aspiring intruders. The alarm is when pressure is applied to the crest of the device when the door is opened. A irritable trigger switch intruders from bypassing the alarm by sounding the siren no matter how far the door is opened.