The transmitter’s digital signal path eliminates the need for an analog compandor, resulting in pristine, noise free audio fidelity throughout. Internal DSP provides compandor emulation so that the unit can be switched for use with 100, 200 and 400 series Lectrosonic receivers. The input section features a tap suitable for any microphone or line level audio source. 0 / -20dB LEDs are provided for accurate level settings, and an “Audio Level” dial is located on the top face of the unit. Two rotary frequency adjust dials are located on the side panel. The 1.6MHz is a coarse adjustment and the 100kHz is the fine. The unit is powered via 9V battery and is enclosed in a rugged metal enclosure, made to withstand the rigors of road use.