[Underground metal detector] Zhengzhou where to sell? Product quality and how? Phone? Product description: The overall electronic, extending the use of silicon transistor technology, so its operation is very stable and accurate! Detector built-in speakers and an external headphone; make its procedures more simple. The instrument out of the capacitance effect, since it is made of aluminum alloy and the use of a separate transport Source: transmitter and receiver; instrument error detection signal from the interference, it is very high accuracy rate. Vertical detection technology, this situation is very suitable for use in places surrounded by metal detection sensor only through the receiver whether the target vertically below the alarm, the signal is very accurate. Products are mainly used to detect and identify buried in the ground using a metal detector is low, thus avoiding the capacitance effects and high sensitivity. The operation of the instrument and positioning is very accurate, especially for deeply buried metal. Can be widely used in: archeology, prospecting; underground metal artifacts buried longer, stronger electromagnetic signals!! Using the latest electromagnetic ultrasonic: Discover hidden treasures of gold and silver buried in the ground and metal artifacts. Technical parameters: a balanced line, greatly improving the effective detection of the depth and accuracy: a distinction ferrous metals (iron and steel) and nonferrous metals (gold, silver) function; assembly is simple, easy to carry; may be used alone to listen with headphones Signal! maximum depth: Underground 2 meters deep inside the metal can be detected! Signal frequency: 550KHz Audio Frequency: 420Hz Power 2W Weight: 3Kg Working Current: 12 DCV Zhengzhou Megumi Instrument Co., Ltd. Contact: Mr Zhu 13017693918 Contact Tel :0371-66227105 QQ: 625132122 Address: Zhengzhou City, South Street, West Street intersection (Tube City Commission southward 300 m) official website: www.91-17.co