Model：GT770J

1. Power supply: 2 x 9V (6F22)  

2. Frequency: 7.7 KHz               

3. Sensitivity: US 25 cents: 15-18CM

4: Alarm indication: LCD indication and sound indication

5: 2 modes of operation: ALL-METAL ,DISC Mode

6. Expansion length: 78-110cm

7.search coil size: waterproof 26x 26cm

8: Backlight

9. Color: Black or OEM

Inner box：45x26.5x10cm

Carton size：10pcs/ctn， 54x52.5x47cm