hand hold metal detector

Related parameters:
Working frequency: 20 Khz 

Weight: 272 g (including battery) 

Size: length: 420 mm width: 138 mm height: 110 mm grip size: 30 X30mm
Regulating mode: manual 

Indicator: a buzzer, vibration motor LED lights that LED red warning of the indicator LED green LED battery voltage shortage indicator Electricity pool: section 1 a 9 V battery (for normal working 40 hours) 

Control: circulation switch (ON, OFF, sound and light or vibration mode) 

Function: detection man hidden metal objects 

Characteristics:
1, the circulation switch switch alarm and hidden respectively noise vibration alarm function
2, high sensitivity, can detect ferrous and non-ferrous metals. Use simple, convenient and adjustment easily.
3 and when detect metal with voice (or vibration) and light and alarm function
4, alkaline batteries to 10%-15% alarm proportion work, can work continuously 40 hours.
5, a 9 V battery put to 7 V or so, detection distance is unchanged. The battery voltage is insufficient, will be continuous alarm