PRODUCT NAME: Hand Held Metal Detector POWER VOLTAGE: Standard 9V Battery OPERATING VOLTAGE: 7V-9V WATERPROOF: IP31 PACKAGE: 25pcs/carton USAGE: Security Check ALARM TERMS: Sound (vibration) And Light Alarm UNIT DIMENSION: 410(L)* 85(W)* 45(H) Mm DETECTION SENSITIVITY: 2.0mm Pin High sensitivity adjustable hand held metal detector with 9V battery General Specifications Dimension of unit: 410(L)*85(W)*45(H)mm Net weight of unit: 400g Operating current: < 50mA ;Operation frequency: low Operating temperature: '-5 to +55 Power: 9V (6F22) alkaline battery ,operate voltage 7V-9V Alarm: video LED & audio/ video LED & vibra Sensitivity adjust knob Sensitivity level: detect pistol at 90mm, six inches knife at 60mm, razor blade at 30mm, pin at 10mm Product features High sensitivity Detects a pin within 30 to 60mm Conveniently and simply to operate Easily to adjust When battery voltage drop from 9 to 7V, detecting distance remain unchanged Energy smart: can work 40 hours continuously Except the light alarm, audible alarm and the vibratory alarm can be chosen When the battery nearly dies, audible alarm or vibratory alarm should be a warning Turn on (off) the detector, it will give you an audible alarm or a vibratory alarm There are also two sensitivities, high and low, to select Rechargeable:charge it about 4-6 hours after the battery die Self-checking: it self-checks when it starts Using ABS, durable