Features: 1.ultra-high sensitivity 2.Durable,high-impact,with ABS case,without damage from one meter high fall down. 3.Light weight, wide range detecting area, fast detecting speed. 4.Two alarm modes are available, LED sound and light alarm or vibration alarm. 5.Can adjust the sensitivity, easy to operate, to meet the different testing requirements. 6.With undervoltage indicator,When voltage is below 7V, the low voltage indicator lights,Install the rechargeable battery, you can directly charge the product completely. 7.Can detect all kinds of metal objects hidden in the human body, including pistols, small knives, box knives, jewelry, electrical components and so on. Applications: 01. Airports, 02. Transport terminals, 03. Buildings, 04. Customs / Border / Government 05. Courthouses, 06. Embassies, 07. Military installations, 08. Prisons, 09. Convention centers, 10. Security checkpoints 11. Special events location Technical Parameters: Dimensions: Length 410mm x 85mm x 45mm Power supply: Standard 6F22 9V battery or (rechargeable battery kit is optional accessory) Frequency: about 25KHz Voltage: 9V (6F22) Net weight: 400G (without battery) Use temperature: -15 ~ +55 Packing: 25 per case Detection distance: Pin: 30-60mm Sixty-four type pistol: 180-195mm Six inch dagger: 160-180mm Diameter 20mm steel ball: 120mm One RMB coin: 75-100 mm