Feature:   1. [High Sensitivity] With high sensitivity and stability, the detector can identify different types of metals and can easily find metal objects that are useful to you.     2. [Quick Scanning] The detector uses a microelectronic processor to control the chip unit calibration and instrument self checking system, which can scan and test easily and quickly, improve the work efficiency of treasure hunters and reduce labor time.     3. [Accurate Located] Detectors can identify specific types of metals through frequency modifiers, pinpoint exactly where objects are buried and locate, have long range search systems and precise location detection systems.     4. [Wide Application] In addition to military applications, detectors are also widely used in security inspections, archaeological treasure exploration, and prospecting.     5. [Detectable Variety] The detector can detect gold, silver, copper, conventional precious metals, and gemstones, such as diamond, emerald, ruby, etc.             Specification:               Item Type: Metal Detector  Material: ABS,sponge coating       Battery: Built in rechargeable battery (Ni Cr) 2000mAh (built in)  Uses: In addition to military applications, it is also widely used in security inspections, archaeological treasure exploration, and prospecting.  Detected Objects: Gold, silver, copper, conventional precious metals (palladium), gemstones (diamond, emerald, ruby, etc.)  Search Range: Approx. Maximum 1400m / 4593.2ft  Detection Depth: Approx. Maximum 20m / 65.6ft  Transmission Frequency: 5.6-6KHz  Signal Frequency: 360-440MHz