Technical Specifications:
1. Power: 9V (6F22)
2. Operate Frequency: 52 kHz +/- 10% (sine wave)
3. Operating Temperature: -5℃to +55℃
4. Indication: audio alert and LED (red) alert
5. Indicator Visual: Red / Green LED
6. Blinking green indicator when the unit is working properly
7. Audio tone changes as the metal size changes
8. High Sensitivity: >50mm at USD 25 Cent
9. Low Sensitivity: >20mm at USD 25 Cent (used in place with interference)
10. LED indicators on both front and back faces are optional
11. Low battery indication
12. Export Packing: 20 Pieces per Carton, 13kg/carton
10. N.W. / G.W for Unit: 340g /500g
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