Underground Metal Scanner 49.2ft Depth 3280.8ft Range High Accuracy Sensitive Metal Detector with Screen for Copper Gold Silver Yellow Frame US Plug 100‑240V Item Type: Underground Metal Scanner Material: Aluminum Weight: Approx. 1440g / 50.8oz Search System: Microcomputer CPU Control And Reflective Conductivity Product Size: Approx. 292x103mm / 11.5x4.1in Display Screen Size: Approx. 95x55mm / 3.7x2.2in Search Range: 1000m / 3280.8ft Detection Depth: 15m / 49.2ft Signal Frequency: 400-470mhz Host Battery (Built In): NiMH Rechargeable Battery, AAA, 1000MAH Detection Type: Copper, Gold, Silver. Working condition: 1. Under fully charged condition, turn on the host detector, pull out the antenna, and turn on the sensor switch. Press the sensor to the corresponding keys of the items to be detected, adjust the host detector to adjust the depth and scope of the search function for detection; 2. In the handheld stable without other interference, when detecting the designated detection of items it will swing left and right. When detecting larger items the swinging action amplitude will increase; Power on test: After turning on the host and the finder switch, the working indicator light on the finder will flash; when the gold gear is selected on the host, the corresponding gold indicator light on the finder will light up, and when the other silver gears on the host are selected in turn, the corresponding indicator light on the finder will light up. If the host selects the gear, and the corresponding indicator on the search instrument is not lit, the host and the finder may be insufficient power, and need to be recharged. If the above situation is normal, it means that the instrument is normal and can be used without worry.