mini handheld body scanner for metal detection MD200A 

1. Technical specifications
A. Operating frequency: 20 KHz
B. Unit Weight: 272g (including the battery)
C. Handle Dimension: 30 X30mm
D. Unit Dimension: 420(L) X 138(W) X 110(H) mm
E. Sensitivity Adjustable: manual
F. Indicator: BZ, vibration motor
G. Battery: a 9v battery 
H. Operating Temperature: -5°C to +55°C
I. Control: Circulation switch (ON, OFF, sound & light alarm or vibration)

2. Characteristics
A. It features simple operation, exquisite design, and convenient conservation
B. Low failure rate, can detect ferrous metal and non-ferrous metal
C. High sensitivity, can easily detect pin-sized metal articles
D. Indication of low battery voltage: gives continual sound alarm or vibration
E. Alarm: sound and light alarm simultaneously, or vibration and light alarm
F. Adopt cycle-switch to switch sound alarm to hidden vibration alarm respectively

3. Detecting distance:
DIP14 IC (integrate circuit)---- 5mm 
64 pistol---- 150mm

4. Use domain
For security use: detecting weapons, such as: knife, gun and so on.
For factory or store use: detect any metal articles on the workers' body
For examination place: detect forbidden tools, such as: telephone, electronic dictionary and so on.