Underground Metal Detector Aluminum 15m Depth Silver 1 Antenna 1000m Range Metal Finder for Treasure 100‑240V AU Plug Item Type: Underground Metal Detector Material: Aluminum Gross Weight: 1443g/50.9oz Product Size: Host: 31x16.5cm/12.2x6.5in Accessories Size: 11.5x7.5x3.5cm/4.5x3.0x1.4in Range: 1000 meters Depth: 15 meters Host Battery: NiMH rechargeable battery, AAA, 1600MAH, shipped with built in battery Transmitter Accessories Battery: NiMH rechargeable battery, AAA, 1200MAH, shipped with built in battery Transmission Frequency: 5.6-6KHz Signal Frequency: 360- 440Hz Detection Type: Gold, Silver, Copper, Jewel Charging Time: 10 to 12 hours Usage: Metal finding Working status: 1. When fully charged, turn on the host detector, turn on the sensor switch, press the button corresponding to the item that the sensor needs to detect, and adjust the host detector to adjust the depth and range search function to detect; 2. In the case of steady hand holding and no other interference, it will sway left and right when it detects the designated detection object, and the amplitude of the swinging action will increase when the detected object is larger.