30m Targeting Pinpointer Pulse Induction PI Underwater Metal Detector Metal Finder LED Light Vibration Indication Specifications: Material: ABS Color: yellow+black+grey Detection mode: pulse induction (PI) Detect objects: all metal (iron, aluminum loop, small aluminum product, gold, bronze, silver) Alarm mode: vibration and white LED light Proof: 30M/98ft Tuning: automatic Sensitivity: 25 cents coin: 10mm; one dollar coin: 15mm Frequency: 6.8KHz Current: standby: 8mA, Maximum: 20mA Operating current: 0.03A Operating voltage: 9V Operating temperature: -5℃ to +55℃ Battery: 1 * 6F22 9V battery (not included) Application: testing metal foreign body of 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, checking metal foreign bodies in delivery and luggage. Item size: 420 * 112 * 105mm / 16.5 * 4.4 * 4.1in Item weight: 391g / 13.8ounce