The SK 300 G4-RC is a robust bodypack transmitter for use with any Sennheiser head-worn or lavalier microphone. It has exceptional bandwidth and transmission power and is to be used as part of Sennheiser's evolution wireless G4 300 Series systems, by connecting to Sennheiser's EM G4 receiver. It is easy to use and delivers exceptional speech intelligibility for business presentations, educational lectures and live performances.