Feature: 1. Large-scale accurate detection, precise positioning and detection of object properties. 2. Metal detector is made of aluminum alloy, which has a longer service life. 3. Metals that can be scanned include gold, silver, copper, and gems with high metal content. It cannot detect other metals. 4. With its own degaussing function, you can degauss as long as you approach the ferrous metal through the probe of the receiver and alarm three times. 5. It is widely used in military, security inspection, archaeological treasure hunting, and prospecting. Specification: Item Type: Metal Detector Material: Aluminum Alloy Color: Silver Built-in Lithium Battery: rechargeable (lithium ion battery, 12.6V, 1000-1600mAh) Search Range: Approx. 800m / 2624.7ft Detection Depth: Approx. 14m / 45.9ft Transmission Frequency: 5.6-6KHz Signal Frequency: 360-440Hz Charging Time: 5-8H Application: In addition to military applications, it is also widely used in security inspections, archaeological treasure hunting, and prospecting.. Package List: 1 x Detector1 x Indicator6 x Signal Bar1 x Adapter1 x Manual1 x Plastic Box Note: 1. Avoid mobile phones or other metals close to the instrument during operation.2. It is better to use this instrument in an environment of 0℃‑40℃ and humidity of 10%~30%.3. Please do not use metal to assemble the batteries together, it will cause leakage, overheating, bursting and fire.4. Charging shall not exceed 24 hours. Note: New batteries only need to go through two or three complete charge and discharge cycles to achieve the good results. Keep away from dust and dirt, which will cause corrosion and wear of parts.5. Wipe the probe with a damp cloth regularly to keep its appearance as clean as new. Do not use harsh chemical cleaning products.