Ideal for Airports, Industrial Sites, Goverment Buildings, Schools & Hospitals etc.
- Highly Sensitive.
- Simple and convenient to use .no adjustments required;
- The detection distance will not be changed when the battery voltage drops from 9V to about 7V;
- Low power consumption, Can work for 40 hours continously
- There is automatic and continues alarm when the battery is used up
- Switch on/off audio prompt function
- Witch external rechargeable socket hole
