Metal Hunter Machine Silver 25m Depth with 8 Antenna 1200m Range Metal Detector for Outdoor 100‑240V EU Plug Item Type: Metal Detector Material: Aluminum Gross Weight: 1461g/51.5oz Working Status: 1. When fully charged, turn on the host detector, turn on the sensor switch, press the button corresponding to the item to be detected by the sensor, and adjust the adjustment depth and range search function of the host detector to detect; 2. When the hand held is stable and there is no other interference, the object to be detected will swing left and right, and the swing range will increase when the object to be detected is large; Product Size of Fitting Rod Not Installed: Host: 31.5x16.5cm/12.4x6.5in Size of Accessories: 11.5x7.5x3.5cm/4.5x3.0x1.4in Range: 1200m Depth: 25m Host Battery: NiMH rechargeable battery, AAA, 1600MAH,shipped with built in battery Transmitter Accessory 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, gem Charging Time: 10-12 hours Purpose: Metal search