Features1 Aluminum: Made of aluminum, the metal detector is wear resistant, corrosion resistant, durable, reliable, has good accuracy and stability. 2Powerful Functions: Equipped with intelligent modular operation, the 20m depth metal detector has powerful functions, fast speed and efficiency, is easy and convenient for users. 3Efficient: Equipped with remote search system and accurate positioning detection system, which breaks through the traditional detection method, the 1000m range copper detector is advanced and efficient. 4Reduce Testing Labor: The aluminum metal detector adopts microcomputer control chip unit calibration, can quickly scan and detect, greatly improve the work efficiency and reduce testing labor for users. 5Suitable: The rechargeable metal detector adopts advanced and practical testing method, suitable for detecting gold, silver, bronze and so on.SpecificationItem Type: Metal DetectorMaterial: AluminumWeight: Approx. 1457g/3.21lbColor: Silver Voltage: 100-240VSize: Host: Approx. 31x16.5cm/12.20x6.50in Emitter: Approx. 11.5x7.5x3.5cm/4.53x2.95x1.38in Range: Approx. 1000m/1093.61ydDepth: Approx. 20m/21.87ydHost Battery: 1600mah AAA NiMH Rechargeable Battery (Delivered with Built In Battery) Emitter Battery: 1200mah AAA NiMH Rechargeable Battery (Delivered with Built In Battery) Transmission Frequency: 5.6-6KHzSignal Frequency: 360-440HzDetection Type: Gold, Silver, Copper, GemCharging Time: 10-12 HoursPurpose: Metal Detection Package List1 x Metal Detector 1 x Emitter 1 x Plug 1 x English Use Manual 2 x Antenna