3D 1000m Remote Underground Metal Detector Detection Receiver Transmitter Metal Detecting SuppliesUS Plug 100-240V Condition: Item Type: Metal Detector Material: Aluminium Alloy Search System: Microcomputer CPU Control and Reflective Conductivity Search Range: Approx. 1000m/3280.8ft Detection Depth: Approx. 20m/65.6ft Power Supply: 12V 1000-1600mAh Transmission Frequency: 5.6-6KHZ Signal Frequency: 360-440H Detection Type: Gold, Silver, Copper, Gems Charging Method: The instrument has been installed with a rechargeable battery, directly connected to the charger, can be charged, charging time 10-12 hours Boot test: Turn on the switch of the host and the search instrument, the working indicator on the search instrument will flash; when the copper gear is selected on the host, the corresponding gold indicator on the search instrument will light up, and when the other silver, diamond, and gems gears on the host are selected in turn , The corresponding indicator light on the search instrument will light up. If the gear is selected on the host and the corresponding indicator on the searcher is not lit, it may be that the host and searcher have insufficient power and need to be charged. If the above conditions are normal, the instrument is normal and can be used with confidence.