ACY Marine Metal detector
Product details:
1. Battery: 6 stacked AA batteries (officially equipped without batteries)
2. Current: small～30mA, big～60mA
3. Working voltage: 7.1～9.6v
4. Signal frequency: 7.5KHz+/-1KHz
5. Working environment: -20℃～60℃
6. Dimensions: 43*13*20CM
7. Detection depth: 1-1.5 meters 
