A8 Metal Detector Underground 15m Deep Metal Finder Scanner Search Range 1000m Metal Location Machine Item Type: Metal Detector Material: ABS Range: 1000 meters Depth: 15 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: 5.6-6 KHZ Signal Frequency: 400-470Hz 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 sensor is on. 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;