Volume Control - Adjust the output volume of the loud speaker or headphone.Waterproof Search Coil - You can use the metal detector in the shallow water.Specifications:Type: Metal Finder Only / With Headphone / With Shovel / With Headphone & Metal Shovel With Rake With Rake & Shovel With Headphone Plastic Shovel With Plastic Shovel (Optional)Material: ABS plastic + aluminumSensitivity: Min. 130mm / 5.12" (Test Coin: US 25)Detect Objects: Metal(Iron nail, iron covering, aluminum ring, small aluminum product, coins, gold, bronze, silver)Detection Mode: All Metal, DiscriminationOperating Frequency: 5KHZPower Supply: 2 * 6F22 9V battery (NOT included)Operating Current:Standby 10mA(LCD with backlit color 80mA)Max. 70mA(LCD with backlit color 150mA)Operating Voltage Range: 9VDetection Indication: Mechanical pointer mode, audio modeControl: Power switchSensitivity: AdjustableVolume: AdjustableAdjustable Height of Detector: 78-107cm / 30.71-42.12inchApplication: Testing metal foreign body of r-aw 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, Police department detective search, Detection of interpol search, Checking metal foreign bodies in express delivery and luggage.Operating Temperature: -15-45 / 5-113Storage Temperature: -20-60 / -4-140Item Size: 107 * 27 * 16.5cm / 42.12 * 10.63 * 6.50inPacking List:1 * Metal Detector Main Unit1 * Armrest1 * Connecting Rod 1 * Search Coil1 * Search Coil Knob1 * Plastic Shovel1 * User Manual