· Provide communication channels for speech communication in the mines · Applicable for dangerous environments with possibility of gas and coal dust explosion · Broadcast by connecting with the upper computer to receive the external signal

· Applicable for detecting the concentration of methane in underground coal mines and other places with presence of methane · The zero point and sensitivity can be adjusted and calibrated remotely and the failure self-checking function is provided

Track and locate the underground personnel and objects and realize information exchange with the dynamic object identifier