HAND HELD METAL DETECTOR MD-3003B1
1. High sensitivity. Detects a pin within 30mm�60mm.
2. Conveniently and simply to operate. Easily to adjust.
3. When battery voltage drop from 9V to 7V, the detecting distance remain unchanged.
4. Energy smart: it can work 40 hours continuously.
5. Except the light alarm, the audible alarm and the vibratory alarm can be chosen.