This door knob alarm from TBOTECH delivers a 120 dB siren—louder than a jackhammer—when triggered by a touch on the doorknob, instantly alerting you and deterring intruders. Its vibration-sensitive design detects attempts to enter, ensuring rapid response. Measuring 4.25" x 2.25" x 1" and powered by a 9-volt battery (not included), it hangs on any metal doorknob (or non-metallic doors with non-metal frames) without wiring.
The versatile security device doubles as a personal alarm—clip the chain to your wrist and pull to activate the siren for on-the-go safety. Compact and portable, it’s perfect for homes, hotel rooms, or temporary accommodations, offering reliable protection wherever you are.
This alarm is ideal for versatile security needs:
Equip this alarm for instant, reliable security at home or on the go.
TBOTECH delivers premium security solutions with exceptional benefits:
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This device works well on wooden doors, but not metal ones. Also the alarm siren is not as loud as other devices (such as the door stop alarm).
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