VEVOR Metal Detector Waterproof Disc Metal detectors Underwater Underground high Accuracy LCD Display Metal Detector for Adults and Children Headphone Automatic Detector (Yellow 3010) High Sensitive & Waterproof LCD Control Panel 2 Detection Modes Ergonomic Design Useful Shovel and Headphone Wide Application Sensitivity: At Least 13 cm / 5.1 in,Signal Frequency: 7.5 kHz +/- 1 kHz,Support Battery: 6 x 1.5V,Detection Depth: 16 cm / 6.3 in,Material: ABS, Copper, Aluminum Tube,Search Coil Dia.: 8 in / 203 mm,Net Weight: 3 kg / 6.6 lbs,Adjustable Length: 102-130 cm / 3.3-4.2 in