Thugs and intruders are meaner and more brazen than ever before. It's a sad fact, and we all have to be as vigilant as possible. We've got something to help you out on that score, though. This Pro-Tec Door Alarm from Street Wise Securities utilizes dual-sensing technology to emit a shrill, 110 dB alarm if someone touches your doorknob. That's right--they touch it, and the siren goes off! It works for virtually any door with a turning door knob, even if the thug is wearing gloves. This makes it effective on two fronts: it will let you know somebody's trying to intrude, and it will most likely scare off the intruder. Get one for your home, office or even bedroom door! It's a must-have security accessory for this day and age!