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[tab]20mm steel ball at 63.5mm depth[br]Power consumption[tab]270mW-50mA[br]Operating frequency[tab]22kHZ[br]Operating temperature[tab]-30 to 30°C[br]Battery[tab]9V PP3 (supplied)[br]Dimensions[tab]410 x 85 x 45mm[br]Weight[tab]395g (without battery)