1、Premium Aluminum: Made of premium aluminum, the metal detector is wear resistant, corrosion resistant, durable, reliable, has good accuracy and stability. 2、Powerful Functions: Equipped with intelligent modular operation, the 20m depth metal detector has powerful functions, fast speed and efficiency, is easy and convenient for users. 3、Efficient: Equipped with premium remote search system and accurate positioning detection system, which breaks through the traditional detection method, the 1000m range copper detector is advanced and efficient. 4、Reduce 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. 5、Suitable: The rechargeable metal detector adopts advanced and practical testing method, suitable for detecting gold, silver, bronze and so on. Item Type: Metal Detector Material: Aluminum Weight: Approx. 1457g/3.21lb Color: Silver Size: Host: Approx. 31x16.5cm/12.20x6.50in Emitter: Approx. 11.5x7.5x3.5cm/4.53x2.95x1.38in Range: Approx. 1000m/1093.61yd Depth: Approx. 20m/21.87yd Host 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: 5.6-6KHz Signal Frequency: 360-440Hz Detection Type: Gold, Silver, Copper, Gem Charging Time: 10-12 Hours Purpose: Metal Detection 1 x Metal Detector 1 x Emitter 1 x Plug 1 x English Use Manual 2 x Antenna