Feature: 1. LONG BATTERY LIFE: The underground metal detector transmitter has a built in 1600mAh high capacity rechargeable battery, and the receiver has a built in 1000mAh high capacity rechargeable battery for a long life. 2. HIGH ACCURACY: The metal detector can identify specific types of metals with a frequency regulator, a remote search system and a precise position detection system. 3. ABS HOUSING: The underground metal detector is made of ABS plastic, which is durable, safe, easy to use and has a long service life. 4. HIGH EFFICIENCY: The microelectronic processor controls the chip cell calibration and instrument self test system, allowing for easy and fast scanning and testing. 5. WIDE APPLICATION: Handheld metal detectors are suitable for finding treasures and can be used to find gold, silver, copper and various metals. Specification: Item Type: Underground Metal Detector Material: ABS Maximum Detection Depth: 25 meters or so This instrument for a 5 x 5cm object, at least 4 meters can be detected. A 30 x 30cm object, can detect 5-10 meters, if the size of the object buried for a long time, can up to 25 meters. If the larger the area of the object, his detection depth will deepen. Specific Functions: 1. can accurately determine the buried location of the object, can be located. 2. Can rely on the frequency regulator to identify the specific type of metal. Search System: Microcomputer processor control and reflective conductivity Search Range: 1200 meters Detection Depth: 25 meters Battery. Transmitter: 1 x 12V 18650 1600mAh rechargeable lithium battery (built in) Receiver: 1 x 12V 18650 1000mAh rechargeable lithium battery (built in) Transmitting Frequency: 5.6-6KHz Signal Frequency: 360-440Hz Detection Type: Gold, silver, copper, etc.. Package List: 1 x Transmitter1 x Receiver1 x Power Adapter1 x Instruction Note: The explorer must slowly rotate, and to maintain a stable body.