GTX5030 Portable Underground Metal Detector with Waterproof Search Coil Length Adjustable High sensitivity Gold Treasure Metal Finder Hunter Under Shallow Water. Adjustable stem lets you adjust the detector's length for comfortable use. Display interface is clearer and faster to read data. With handle and elbow support which can let you carry and operate your detector comfortably, to make sure this detector is easy for people of different sizes, ages.Suitable for finding and testing metal objects, gold and silver jewelry, coins, relics, etc. Whether you are a budding or an experienced metal detecting hobbyist, you can easily use it. Audio alert and pointer indicate the detection of metal. With the volume control knob, you can adjust the output volume of the loud speaker or headphone.Operation modes: all metal and DISC Sensitivity: Max. depth 180mm for a U.S quarter in all metal mode Detect objects: metal (iron nail, iron covering, aluminum loop, small aluminum product, coins, gold, bronze, silver) Operating frequency: 5.69KHz Power supply: 2 * 9V battery (not included) Operating current: standby 10mA, Max. 70mA Detection indication: mechanical pointer mode, audio mode Sensitivity: adjustable Volume: adjustable Adjustable stem: Max. length: 1080mm / 42.5in, Min. length: 780mm / 30.7in Waterproof search coil diameter: 200mm / 7.9in Speaker or earphone jack: 1.2inch Application: testing metal foreign body of raw materials, fuel and food, detection of underground pipeline & line, archaeology, exploration, found buried of gold, silver and metal artifacts, the acquisition of scrap metal industry, customs and safety inspection, detection of search, checking metal foreign bodies in expressage and luggage. Note: 1. The search coil is waterproof, but the control housing is not waterproof. 2. This product does not include headphones. (Powered by 2 9V batteries, without batteries) Color: Black Material: Metal Package Contents: 1 * Metal Detector Set 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.