This series of products is true diversity for infrared automatic frequency channel 2 wireless microphones, receiving distance of 150 meters, built four receiving circuit and external four receiving antenna, any a microphone, there are two receiving circuit for receiving at the same time, with less noise interference of UHF frequency band PLL phase locking technology. Microcomputer CPU control, secondary frequency conversion technology, sound reduction degree is high. 200 channels to choose from, regardless of channel A and B using more convenient. Suitable for high requirements, environment complex, the required distance. Technical parameters of the receiving launch unit (: please refer to UW - 8240 launch unit parameters)