Metal Detector with Display 1200M Range 25M Depth Sensitive Handheld Underground Treasure Finder Scanner for Copper Gold Silver Item Type: Metal Detector Material: ABS Weight: Approx. 1277g/45.04oz Color: Black Search System: Microcomputer CPU control and reflective conductivity Product Size: Approx. 28x13cm/11.02x5.12in Search Range: Approx. 1200m/3937ft Detection Depth: Approx. 25m/82ft Signal Frequency: 400 to 470MHz Main Unit Battery: Rechargeable NiMH Battery, AAA, 1000mAh (shipped with built in battery) Detection Type: Copper, gold, silver, precious stones Working Status: 1. Full charge the main detector, open the host detector, extend the antenna, turn on the sensor switch, press the corresponding key of the item to be detected, and adjust the depth and range search function of the host detector for detection 2. Under stable handheld conditions without other interference, the detector will swing and shake when detecting the specified item, and the swing amplitude will increase when the detected item is larger Startup Test: 1. Turn on the host and the search device switch, the working indicator on the search device will flash, when the gold gear is selected on the host, the corresponding gold indicator on the search device will light up. When other gears such as silver and precious stones are selected on the host, the corresponding indicators on the search device will light up. 2. If the selected gear on the host does not light up the corresponding indicator on the search device, it may be that the power of the host and the search device is insufficient and needs to be charged. 3. If the above situation is normal, it means that the instrument is normal and can be used with confidence.