Highlights...Reliable， high quality and durablePerfect for entertainment businessesMetal detector with extreme sensitivity for best detectionChina Manufacturer SpecificationsProduct Description: Metal DetectorDetection Indicator:- Visual = Red/Green LED- Sound + VibrationControl:- On/Off- Low/Normal SensitivityOperating Frequency: 93KHzPower Source: 1x 9V Battery (not included)Dimensions: 420mm x 85mm x 42mm (L x W x D)Wholesale Electronics Ref.: Wholesale C9H446FXYVJ5Notes from ManufacturersIP 54 rated - Good for use outdoors or indoors.High or Low Sensitivity Settings: A pen knife will be detected at 4 Inches at low， and 6 Inches at HighVery High Detection Ability: Detection of USD 25 cent piece at 45mm away