GP-3003B1 Hand Held Metal Detector

Characteristic:
1. Highly sensitivity.
2. Simple and convenient to use, no adjustment is required.
3. The detection distance will not be changed when the battery voltage drops9V- 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. With external rechargeable socket hole.
7. Alarm: sound and vibration alarm.