Base on RU-8012DB successful experience, RU-12 share the same functions and technologies as RU-8012DB but with metal chassis. To cope with the squeezed radio spectrum the system provides more compatible channels within limited bandwidth. The patent pending REMOSET sends the scanned channel data to transmitter by pushing a button. To meet critical audio demand general noise and hiss noise have been reduced to an extremely low level. Over 100 meter operation range meets most demand from most applications.