Specification: Item Type: Metal Detector Product Size: 230x40x40mm/9.1x1.6x1.6in Working Temperature: -37~70℃ Dust: Complies With LEC 60529 Index: Proportional Audio Frequency / Vibrating Artery Rate Control: Power Switch Alarm Indication: Sound and Vibration at The Same Time Sensitivity: ≥3cm (1 Rmb coin) Battery Information: 9V Folding Battery (6F22ND) (Without Battery) Detection Method: Vibration, Light Alarm Sensitivity Distance for Detecting One Yuan Coins Is ≥3-5cm/1.2-2in, With Undervoltage Indication FunctionWeight: Approx. 232g/oz Package List: 1 x Detection Rod 1 x Leather Case 1 x Telescopic Drawstring 1 x Instruction Manual Features With ultra high stability and high sensitivity design, the detection surface is 360° all round detection, making it easier to find contraband The product design is humanized, equipped with special hanging accessories, and the body is small and easy to carry The front section of the instrument is equipped with a high brightness LED light, which can be used as a lighting tool when the light is sufficient The instrument does not need to be adjusted, and the operation is simple, convenient to use Equipped with low voltage indication function, when the instrument is under voltage, the yellow LED light at the middle end will light up, and the battery should be replaced when it is lifted