Product Features: 1. Two working modes: all-metal mode, recognition mode 2. Volume adjustment: adjust the volume of speakers and headphones 3. Headphone Excuse: Connect the headphone to use 4. Pointer display: the pointer will swing after finding the metal 5. Waterproof detection disk: metal detector can be used in shallow water 6. Adjustable rod: adjust the length of the metal detector Specifications: 1. Power supply: 29V (6F22) 2. Frequency: 5.0KHz 3. Current: Static: 10mA, Maximum: 70mA 4. Voltage: 7.2-9.6V 5. Sensitivity: US 25 Cent: 130mm 6. Display mode: mechanical pointer mode, sound mode 7. Telescopic length: 30.7-42.1 inches 8. Diameter of detection disc: 6.5 inches Package Contents: 1 * MD-4030 Metal Detector 1 * User Manual 1 * shovel 1 * Headphones 1. Widely used - great for finding metal objects and anywhere you need to detect hidden metal. Adjustable Sensitivity - Controlled by Sensitivity. 2. Find Metals - Look underground for gold and silver jewelry, coins and other metals (nails, iron caps, aluminum rings, small aluminum items, coins, gold, bronze, silver).