Specifications:

• Operating Frequency:20KHz
• Detection distance
  Pin: 30-60mm
  64 model handgun:150mm
  6-inch long knife:160mm
  Diameter 20mm Steel Ball:90mm
• Power Source: 1x 9V Battery
• Adjustment method: Manual
• Alarm mode: Audible beep or vibration alert
• Color: Black
• Dimensions:440 X 55 X 145mm
• Weight:409g