1. Characteristic:
Detecting pin: 10-30mm;
Detecting 64-type pistol: 120mm;
Detecting 6 inch knife: 130mm;
Detecting steel ball(dia. 20mm): 90mm.
Additionally, the following functions are added:
Display way: the content shown on the LCD screen can indicate alarming mode, degree of sensitivity, object’s size directly and also the time and temperature, electric quantity of the batteries, etc (Products of same kind in the market don’t have such function);

