Feature:1. [TYPE IDENTIFICATION] Handheld metal detector can identify specific types of metal through the frequency regulator, so that you can easily find metal items that are useful to you.2. [LARGE RANGE] The detection range of this metal detector can achieve 1000m, and the underground detection depth can achieve 20m, with high accuracy and sensitivity.3. [SELF CALIBRATION AND INSPECTION] Micro electronic processor controls chip unit calibration and instrument self inspection functions, making detection more accurate and efficient.4. [ALUMINUM ALLOY MATERIAL] The metal locator is made of premium aluminum alloy material, which is safe and sturdy, light and portable, convenient to use.5. [WIDE APPLICATION] This treasure finder is suitable for finding treasure, gold, silver, copper and stones.Specification:Item Type: Metal DetectorMaterial: Aluminum AlloyDetection Depth:1. Maximum Detection Depth: About 20 meter2. For a 5x5cm object, can detect at least 3.5 meter3. For 30x30cm object, can detect 5 to 8 meter. If the object of this size is buried for a long time, the detection depth can achieve 20 meter4. The larger the area of the object, the deeper its detection depth will beSpecific Functions:1. It can accurately determine the buried position of objects and locate2. It can also rely on the frequency regulator to identify the specific type of metal3. Search System: Microcomputer processor control and reflection conductivity4. Search Range: Approx. 1000m/3280.8ft5. Detection Depth: Approx. 20m/65.6ftBattery: 1. Transmitter: 1 x 12V 18650 1600mAh rechargeable lithium battery (built in)2. Receiver: 1 x 12V 18650 1000mAh rechargeable lithium battery (built in)Transmission Frequency: 5.6-6KHzSignal Frequency: 360-440HzDetection Type: Gold, silver, copper, stone, etc..Package List:1 x Transmitter1 x receiver2 x Signal Rod1 x Power Adapter1 x User Manual