Goint God Bug Metal Detectors High Sensitivity Detectors 1. Maximum detection depth: 1.5 to 2.5 meters 2. Working frequency: 19KHz 3. Working principle: VLF very low frequency technology 4. Power supply: 4 x 1.5V AA alkaline batteries (not included) 5. Packing list: 11-inch probe coil x 1, host x 1, pole x 2, manual x 1 6. Weight: about 1.5kg Features: 1. 11 inch DD oval waterproof search coil for deep penetration 2. Can find small gold nuggets in hard soil 3. Variable breakpoint tone identification system 4. Computerized Ground Grab TM, real-time computerized ground balance 5. V.C.O. audio in all metal and identification modes 6. Transmission security and independent gain control 7. Continuous ground condition readings 8. Mineralization type indicated by ground phase value, mineralization amount graphical display 9. Static precision positioning with depth indicator