Metal Detector Dual Antenna Underground 20m Deep Metal Finder Scanner Device Search Range 1000m Blue US Plug 100-240V Item Type: Metal Detector Material: Aluminum Gross Weight: 2873g / 101.3oz Color: Blue Product Size: Host: Approx.32 x 16.5cm / 12.6 x 6.5in, Accessory Size: Approx.11.5 x 7.5cm / 4.5 x 3.0in Range: 1000 meters Depth: 20 meters Host Battery (delivered with built in battery): NimH rechargeable battery, AAA, 1600MAH Emitter Accessory Battery (delivered with built in battery): NimH rechargeable battery, AAA, 1200MAH Transmission Frequency: 5.6-6KHZ Signal Frequency: 360-440Hz Detection Type: gold, silver, copper Charging Time: 10-12 hours Purpose: Metal search Working Status: 1. When fully charged, turn on the host detector and the switch of the sensor, after pressing the button corresponding to the item to be detected by the sensor, adjust the depth and range search function of the host detector to detect; 2. When the hand is held smoothly and without other interference, it will sway from side to side when detecting the specified detected item, and the amplitude of sway action will increase when the detected item is larger;