20M Depth Metal Detector with Screen Search Finder 1200M Range Deep Underground Gold Silver Copper Treasure Finder for Security Inspection 100‑240V US Plug Item Type: Metal Detector Search System: Microcomputer CPU control and reflectance conductivity Material: Aluminum Product Size: Approx. 292 x 103mm / 11.5 x 4.1in , Display Screen: Approx. 95 x 55mm / 3.7 x 2.2in Search Range: 1200m Detection Depth: 20m Signal Frequency: 400—470mhz Main Host Battery (delivers with in built battery): Ni MH Rechargeable Battery, AAA, 1000MAH Detection Types: Copper, Gold, Silver, Gemstones. Working Status: 1. With full charge, open the host detector, extend the antennae, switch on the sensor, press corresponding buttons for items to be detected, adjust the host detector for depth and search range features for detection; 2. In stable handheld state with no other disturbances, when the specified items are detected, it will sway left and right. When larger objects are detected, the magnitude of the swaying motion increases. Start Up Test: Switch on the host and the detector. The working indicator light on the detector will flash. When the gold mode is selected on the host, the corresponding gold indicator light on the detector will light up. The same applies when other modes (silver, diamond, gemstone) are selected on the host, the corresponding light on the detector will light up. If the corresponding light does not light up on the detector when a mode is selected on the host, it may indicate insufficient power in the host and the detector, requiring charging. If the above conditions are normal, it signifies that the instrument is functioning properly and is safe e.