The Sennheiser e 604 is a low distortion microphone with a reinforced glass-fiber body. Low distortion allows the microphone to receive audio in its original form and return it with little sound degradation. The unit features low sensitivity to impact and noise handling. The Sennheiser microphone is intended for use with instruments. It has a hum compensating coil and high sound pressure handling capability. Transmission frequency for the music microphone is a minimum of 2.4 GHz. The maximum transmission frequency for the Sennheiser e 604 is 2.48 GHz. Transmission power for the Sennheiser microphone is 8 dBm. Transmission range is 30 feet. The music microphone clips on to a given instrument. A turn-dial knob allows the unit to be adjusted on its swivel clip. This allows custom position of the microphone. The Sennheiser microphone is a non-bulky lightweight unit ideal for movement.