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Security Wand Hand Held Metal Detector
Power Supply:External charging interface or
9Vfold battery (Battery is optional accessory) 1. Power rate: 270 milliwatts 2. Working frequency: 22 kHz 3. Working current: <50 mA 4. Working voltage: 7-9v 7. Dimensions: 390 (length) * 840 (width) * 420 (thickness) mm Detect Distance:1-12cm Alarm Indication:Audio and Vibration at the same time.