Personal Door Alarm
This effective Personal Door security device is actually a dual purpose alarm. It works as a door AND a personal alarm.
Hang it on the door knob of any non-metallic door and it will instantly sound when an intruder touches the door knob. You can also carry it with you as a personal safety device. Just pull out the metal chain to sound the 120 db alarm.
The Door Alarm uses one 9 Volt battery which is not included but you can choose the PLUS option below so you're ready to go.
Defend Yourself