Shop name:Chong Qing Shuo Yue Ke Ji You Xian Gong Si Product features: 1. Two modes of operation: full metal mode and recognition mode 2. Volume adjustment: Adjust the volume of speakers and headphones 3. Headphones excuse: Can connect headphones to use (not provided) 4. Pointer display: The pointer will swing with the of metal 5. Waterproof detection disk: Metal detectors can be used in shallow water Specification parameters: Detection depth range: 1-30cm 1. Power supply: 2 x 9V (6F22) (shipped without battery) 2. Frequency: 6.0 KHz 3. Current: Static: 10mA Max.: 70mA 4. Voltage: 7.2-9.6V 5. Sensitivity: 25 Cent: 180mm 6. Display mode: mechanical pointer mode/sound mode Sound pattern 7. Extension length: 30.7-42.1 inches 8. Probe disk diameter: 8 inches 9. Adjustable rod: Adjust the length of the metal detector Material: ABS colour: Black Package Contents: 1 x Metal Detector kit 1 x English instructions Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.