Feature:
1. Hand?held alarm, easy to operate, just turn the handle to sound the alarm.
2. The sound of the portable manual siren was so loudly that it could be heard from 1/4 mile away.
3. The housing is made of plastic for maximum strength and durability.
4. Widely used in factories, schools, troops, disasters and seaside guards, etc. can effectively provide timely warnings during incidents.
5. With small size, easy to carry and store, convenient to use and with good performance.

Specification:

Item Type: Hand Crank Siren
Operation Type: Hand Operated
Sound Type: Siren
Construction: ABS Plastic Housing
Size: Width: Approx. 5.51in Height: Approx. 9.09in Depth: Approx. 7.95in
Decibel: 120db

Size: Approx.11cm / 4.3in
23cm / 9.1in
Product Description:
1. The portable alarm is a hand-cranked sounder that does not require power support. It is called differently due to local differences.
2. Including handle, gear speed increasing mechanism, slider, fixed wheel, ringing wheel, sound window cover, gear box, box frame, the handle is connected with the driving shaft of the gear speed increasing mechanism, and the output shaft of the gear increasing mechanism passes through The pin is connected with the sliding block, and the sliding block is connected with the flange of the impeller by friction transmission.
3. There is no need for power support, and the power is provided by shaking the handle to make the alarm send out an alarm . The sound level depends on the speed of the hand.
4. In terms of style and purpose, it is divided into fixed hand-operated alarm and portable hand-operated alarm.
5. Hand-cranked alarm is light in weight, easy to carry, can be detached, and the handle will sound an alarm.
6. Widely used in factories, schools, troops, special flood control, disasters, open barracks, air defense