hand hold metal detector

MD-3003 B1 handheld metal detectors 

performance and features:
1, the operation is simple, equipped with holster, easy to carry.
2, charge function, charging time for four to six hours (charger for choosing a).
3  when the voltage is not enough, not bright lights or has been alarming.
4, a sound and light and vibration alarm double tip way.
5, first using automatic reset function switch to switch sensitivity, so as to realize that can detect the bulky, can also detect small metal items.
6,can according to need to adjust the sensitivity. 

specifications:
1, the detection sensitivity: Φ 2.5 mm steel ball.
2, the power supply: 9 volt battery (6 F22ND).
3, power consumption: 270 mW.
4, working frequency: 22 KHz.
5, working current: less than 50 mA.
6, working temperature:-5 ℃-55 ℃.
7, net weight: 409 g.
8, size: 410 * 85 * 45 mm.
9, packing size: 580 * 330 * 460 mm (25 a/box, weight: 12.5 KG / 13.5 KG).