Pinpoint cheap hand held metal detector with audio alert and LED indicator work together

MD-3003B1 is a universal-type hand-held metal detectors, cost-effective, stable performance. Mainly used to detect metal necessary places, such as security 
Day-to-day metal anti-theft examination, examination room, the school to bring communications tools to prevent cheating of the inspection work, as well as non-specified places, such as metal detectors, 
The use of the hand-held metal detectors to carry out physical inspection to avoid manual search of human rights brought about by the dispute. 

Performance and features: 
1. Easy to operate, equipped with leather, for carrying 
3. When enough voltage, the indicator light does not shine or alarm has been 
4. Has light and sound vibration alarm prompted the dual mode 
5. First use of automatic reset switch to switch the sensitivity function, thereby achieving that is capable of detecting large, but also can detect small metal objects 
6. May need to be adjusted according to sensitivity 

Specification parameters: 
1, detection sensitivity: Diameter 2.5mm Ball 
2, power supply: 9 volt battery (6F22ND) (not include)
3, Power consumption: 270mW 
4, operating frequency: 22KHz 
5, the working current: less than 50mA 
6, the working temperature: -5 -55 
7, Net Weight: 409g 
8, size: 410 * 85 * 45mm 
9, packing size: 580 * 330 * 460mm (25 support / box, weight: 12.5KG/13.5KG)