Applications: 1. Electronic detection inspection at airports, railway stations and wharfs; 2. Security inspection of customs, public securities, frontier defense and safeguard authorities; 3. Quality inspection of medicine and food commercial systems; 4. Security inspection of important sites and playgrounds; 5. Noble metal detection, such as gold or silver jewelry manufacturing plants.
Feature: 1. Highly sensitive; 2. Simple and convenient to use, no adjustment is required; 3. The detection distance will not be changed when the battery voltage drops from 9V to about 7V; 4. Low power consumption, can work for 40 hours continuously; 5. There is automatic and continues alarm when the battery is used up; 6. Switch on/off audio prompt function; 7. With external rechargeable socket hole; 8. Has audio, light and vibration handoff switch.