Features:Detect Wooden Pillar、 Metal Stud、 Metal Pipe and AC VoltageApplicable in house or office decorationSound and LCD Dynamic IndicationsLow Battery IndicatorAuto Power OffOperating Temperature & Humidity: 0~50¡æ 50%RHFully automatic operationSpecifications:Detection deepness wallboard thickness remark 0~0.5cm 0.5-2cmwooden pillar/metal stud ¡Ý3cm 2-3cm Non-metal and dry wallboardMetal Pipe 6cm 6cmAC voltage ¡Ý20cm ¡Ý20cmOperating range: Non-contact AC Detector 50-600V AC 50-60HZGeneral Characteristics:Product Size: 160mm * 70mm * 42mmProduct Weight: 200gPower Supply: 1 * 9V/6F22 battery (not included)Package Size: 18.5 * 11 * 6.5cm / 7.1 * 4.4 *2.5inPackage Weight: 279g / 9.8ozPackage List:1 * MASTECH MS6906 Scanner1 * English Manual