Competitive Advantage:
* Simple and convenient operation
* Fairly low consumption of battery
* Extremely high detecting speed
* Extremely high accuracy and sensitivity
* The battery management system continuously monitors the deficiency of power and voltage
* Most adapting to men's hearing difference, it will generate different alarm tones depending
on the size and distance of metal
* The alarm sound will last when finding metal and continuously lock its correct position
* The probe will give an alarm easily when a pin is 35mm to it