Detailed Product Description

Hand operated alarm is an audible warning device in order to indicate a dangerous or emergency situation and designed to provide effective warning in applications where there is no power supply ,such as:Civil defence. Camp sites. Mountain rescue. Frontier sentry and coast guard warning.
Due to lightweight thesirens can be easily transported to remote locations and folded up to a small size for easy of carrying,furthermore the price is quite cheap,so this kind of alarms are welcomed by customer
The character of hand operated siren list as follow
1.No power supply required
2.Compact and lightweight for portability
3.Powerful low frequency sound
4.Universally recognised signal
5.Shutter mechanism to provide a choice of signals