This high performance handheld metal detector is designed to meet the requirements of the security industry and is ideal for body searches in locations such as border/building security and crowd control. It can also be used to scan parcels or letters for metal objects or in any other application where the presence of metal poses a security threat.Detection range: 20mm steel ball at 63.5mm depthvbCrLfPower consumption: 270mW-50mAvbCrLfOperating frequency: 22kHZvbCrLfOperating temperature: -30 to 30°CvbCrLfBattery: 9V PP3 (supplied)vbCrLfDimensions: 410 x 85 x 45mmvbCrLfWeight: 395g (without battery)