MD3010II High Sensitivity Underground Metal Detector 1. Material: ABS plastic + aluminum + copper 2. Detection diameter: 8 inches 3. Detection object: metal 4. Current: 30-60mA 5. Working voltage: 7.1-9.6V 6. Working frequency: 7.5KHZ 7. Power supply: 6 x 1.5V AA alkaline batteries (not included) 8. Audio: 294Hz (re), 330Hz (me), 349Hz (fa), 392Hz (so), 440Hz (la), 494Hz (ti), 523Hz (do) 9. Detection indication: LCD analog display mode, audio display mode 10. Weight: about 1.1kg Features: 1. Suitable for finding metal objects and places where hidden metal needs to be detected 2. Height and length adjustable, comfortable to use 3. LCD analog display and audio display metal detection 4. Can detect a variety of metal objects, can set some objects that do not want to detect 5. Low battery indicator and large LCD display with backlighting can identify metal at night or outdoors 6. The detector can be set to not respond to certain objects 7. When an object is detected, a tone corresponding to the target will be generated 8. Hidden search coil cable (connection between control unit and search coil) to avoid tangling and easy to adjust the length of the rod 9. With headphone jack for headphone connection, stereo or mono headphones can be used 10. Volume control, adjust the output volume of the speaker or headphones 11. Battery status indicator, showing the status of the battery 12. Waterproof search coil, can be used in shallow water 13. Armrest and armrest bar, eliminate the pressure of the forearm, after holding the detector with the arm for a long time, the nylon bracket can further fix the sliding of the hand box