Our items are guaranteed for their normal life under standard, non-commercial use.
This is the alarm that hangs on a door handle and emits a 110 dB alarm (audible up to 600') when it senses vibration or attempted entry. Versatile enough to fit on any interior or exterior door knob or handle, it scares away would be intruders while simultaneously notifying homeowners and neighbors of the potential break-in. It has two detection methods (vibration or static electricity), three sensitivity settings, and two alarm sounds (siren or chime). Requires three AAA batteries.
The affiliated, independent Hammacher Schlemmer Institute was created in 1983 to rigorously research, test and rate products to make the Best products available to our customers.
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