Features 1、Adjustable stem lets you adjust the detector's length for comfortable use. 2、Display interface is clearer and faster to read data. 3、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. 4、Suitable for finding and testing metal objects, gold and silver jewelry, relics, etc. Whether you are a budding treasure detector or an experienced metal detecting hobbyist, you can easily use it. 5、Audio alert and pointer indicate the detection of metal. 6、With the volume control knob, you can adjust the output volume of the loud speaker or headphone. Specification Specifications: Main material: metal Color: black Operate modes: all metal and DISC Sensitivity: Maximum depth > 180mm for a U.S quarter in all metal mode Detect objects: metal (iron nail, iron covering, aluminum loop, small aluminum product, gold, bronze, silver) Operating frequency: 5.69KHz Power supply: 2 * 9V battery (not included) Operating current: standby 10mA, Maximum 70mA Detection indication: mechanical pointer mode, audio mode Sensitivity: adjustable Volume: adjustable Adjustable stem: Maximum length: 1080mm / 42.5in, Min. length: 780mm / 30.7in Water resistant search coil diameter: 200mm / 7.9in Speaker or earphone jack: 1.2" Application: testing metal foreign body of materials, fuel and food, detection of underground pipeline & line, archaeology, exploration, found buried treasures of gold, silver and metal artifacts, the acquisition of scrap metal industry, customs and safety inspection, detection of interpol search, checking metal foreign bodies in expressage and luggage. Package size: 540 * 220 * 110mm / 21.3 * 8.7 * 4.3in Package weight: 1250g / 2.8lb Package List 1 * Metal Detector Main Unit 1 * Armrest 2 * Connecting Rod 1 * Search Coil 1 * User Manual