The high frequency module is used exclusively for UHF wireless MIC. With audio circuit, transmitting module (TX) could be made into a complete wireless speaker or belt-pack transmitter. Receiving module (RX) consists of noise amplification, one time frequency mixing, twice mixing, local oscillation, MCU frequency control and other functions. With audio circuit, it could be made into a complete wireless MIC receiver. By applying D2008 directly, factories could simplify design and production of UHF wireless MIC, and adopt the module easily in mining industry and electronic consumer system equipments. RX sensitivity is -111dBm@12dBSINAD.