Features [Sound Display] Equipped with a headphone jack, you can connect a stereo headset (not included) and operate, the volume of the speaker and headset can be adjusted. [Mechanical Pointer Display] You can search for metal objects on the basis of the mechanical pointer in noisy places, the detector will wriggle when finding metal objects. [Wide Application] This metal locator can be widely used for gold detection, desert detection, security inspection, archaeology, treasure search, beach detection, etc. [2 Working Modes] This gold detector has an all-metal mode and identification mode, which you can choose to use according to different situations. [Waterproof and Adjustable] The detection disc is waterproof design, you can use this detector in shallow water, the length of the rod can also be adjusted, very convenient for operation. Specification: Item Type: Underground Metal Detector Material: ABS Model: GT6100 Battery: 2 x 6F22 9V alkaline batteries (batteries not included). Frequency: 5.0K Hz. Current: Static: 10mA. Maximum: 70mA. Voltage: 7.2-9.6 V. Sensitivity: 25 cents US: about 130 mm/5.1 inches. Display mode: mechanical pointer mode, sound mode Telescopic length: 30.7 to 42.1 inches. Detection disc diameter: 6.5 inches Headphone jack: about 3.5 mm/0.1 inch. Detection object: Metal (iron nails, iron sheets, aluminum rings, small aluminum products, coins, gold, bronze, silver) Applications: gold detection, desert detection, security inspection, archaeology, treasure search, beach detection Package list: 1 x Underground Metal Detector 1 x search coil 2 x connecting rod. 1 manual. Note: Please note that the new type and old type of this product will be sent at random, and make sure you do not mind before ordering. Package List 1 x Underground Metal Detector 1 x Search Coil 2 x Connecting Rod 1 x Manual