Metal Detector 1000 Range 20m Depth Professional Treasure Finder Gold Silver Copper Locator Scanner AC 100‑240V US Plug Item Type: Metal Detector Material: Aluminum Alloy Detection Depth: 1. Maximum Detection Depth: About 20 meter 2. For a 5x5cm object, can detect at least 3.5 meter 3. 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 meter 4. The larger the area of the object, the deeper its detection depth will be Specific Functions: 1. It can accurately determine the buried position of objects and locate 2. It can also rely on the frequency regulator to identify the specific type of metal 3. Search System: Microcomputer processor control and reflection conductivity 4. Search Range: Approx. 1000m/3280.8ft 5. Detection Depth: Approx. 20m/65.6ft Battery: 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: 5.6-6KHz Signal Frequency: 360-440Hz Detection Type: Gold, silver, copper, stone, etc.