Specifications:

• Power: 9V battery
• Working environment: 50kHz± 10%
• Detection Distance:
  Pin: 35mm
  64 model handgun: 150mm
  6 inches knife: 180mm
  Diameter 20mm Steel ball: 100mm
  US 25cent: ≥ 5cm
• Alarm Mode:
  Red, green flashing LED/Sound alarm.
  Different metal sizes cause different alarm tune.
  It has an earphone function.
• Outer Size: 415 x 90 x 35mm
• Weight: 355g
• G.W./Unit: 460g
• Size/Unit: 43*10*4.5cm