Function features:

*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 the man'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.

Product parameters:

External dimensions: Length 395 mm*140 mm
Product weight: 20/box, 13 kg/box
Unit gross weight: 0.5 KG/1 PCS
Working power supply: 6F22ND  9 V battery (alkaline battery,
rechargeable battery)
Alarm modes: Simultaneous sound and light alarm