Alarm Indication: Audio alert and LED indicator and Vibration, with headphone output.
Sensitivity: >=7cm (a coin)
Power Supply: 9V fold battery (6F22ND), rechargeable.
Quiescent Current: <30mA Operation Current: Audio and LED<62mA, Vibration<90mA
Future and Application: handy structure, beautiful appearance, large scan, high sensitivity. It is be used for gold, silver shop, or jewelry factory, public security personnel, and school exam check where need high sensitivity.