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Small white rectangular vibration alarm unit with toggle switch and indicator light measuring 64 by 51 by 10.5 millimetres weighing

Ruth's sister

Ruth's sister Vibration Door Window Alarm 130dB internal power cable

SKU CH-D1QZ-PBN4W

A compact 130 dB vibration alarm for doors and windows that triggers for 30 seconds on detection and signals low battery below 3 V

  • 130 dB alarm deters intruders instantly
  • Vibration sensor activates within 5 seconds
  • Alarm sounds for 30 seconds per trigger
  • Compact 64 mm by 51 mm by 10.5 mm design fits any frame
  • Low-battery indicator flashes once per second

Vibration Door Window Alarm

The Ruth's sister vibration alarm mounts on doors or windows and triggers a 130dB siren when it detects movement. It is intended for household or hotel rooms where a simple anti-theft deterrent is wanted. The unit runs on three LR44 cells and weighs 23g.

Compact size and battery limits

Measuring 64mm by 51mm by 10.5mm, the device fits on narrow frames without protruding far. The 130dB output covers a single entry point but will not protect multiple rooms or large open areas. Three LR44 batteries power the sensor and siren; when voltage drops below 3V the indicator flashes once per second.

Thermals noise and power draw

The alarm produces a loud 130dB tone for up to 30 seconds per activation before returning to standby. In standby the current draw is low enough that the small button cells last through normal use. No fan or active cooling is present, so the housing stays at ambient temperature during operation.

How it compares

Measured against everything we stock in Internal PSU & Riser Cables, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 65% of the 7,839 comparable items (median $14.99).

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Specifications

No published specifications for this item yet.

Questions about this item

Will the 130dB alarm be loud enough if I keep my existing window sensors?

The 130dB siren is designed to deter intruders and alert neighbours; it operates independently so it adds a high-decibel layer alongside any sensors you already use.

How do I confirm the alarm is active after mounting it on the door?

Switch the toggle on; the indicator flashes and the unit enters sensing mode after 5 seconds. A test vibration will trigger the 30-second alarm and flashing light.

Are the three LR44 batteries included or must I buy them separately?

The specifications list LR44 * 3pcs as the power source; the package contents are not detailed, so plan to have three LR44 cells ready for installation.

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