The Thunder No. 2 Underground Treasure Detector employs the latest American electronic technology, featuring an internal ground-balance circuit. Its ground-balance mode can eliminate the impact of "mineralization reactions," while its identification mode can distinguish between non-ferrous metals and ferrous metals, significantly improving the depth and accuracy of effective detection. It features large detection depth, accurate positioning, strong resolution, and easy operation. To maximize the use of all the features of this product, please read the instructions carefully before use.
This product is not only used in military applications, but also suitable for the following multiple fields:
(1) Rapid search by the public security criminal department
(2) Detecting metal contaminants in raw materials, fuels, and foods.
(3) Check for metal items in your mail and luggage.
(4) Inspect the underground pipes and cables.
(5) Archaeology and Mineral Exploration
(6) Discovering buried gold and silver treasures and metal minerals, and collecting scrap metals.

Product features:
(1) Functional conversion between metal detection and metal identification
(2) Underground metal and metal mineral exploration
(3) Identification of Non-ferrous Metals and Ferrous Metals
Automatic Adjustment Function
(5) Adjust manually to eliminate mineralization reaction
(6) Speaker voice prompt
Battery Low Warning
(8) LED night-light function
(9) Automatic alarm for broken wire in the inductive coil (automatic alarm when the cable is disconnected)

Product Specifications:
(1) Maximum Detection Depth: 2-3.5 meters
(2) Detection method: Ground-based balance detection / Recognition detection
(3) Sound frequency: 413Hz
(4) Signal frequency: 7.2 kHz
(5) Power Supply: DC9V (6 AA Batteries)
(6) Static Current: 40MA
Low battery: 7.2V+0.2V 7.2V-0.2V
(8) Rod length: 1.1 meters
Net weight: 1.8kg Gross weight: 2.2kg
(10) Color box size: 33*17*40cm
Cartoon Box Size: 65*51*42cm (6 pieces/box, 16.5kg)