The Shure PT-2 is a frequency-agile, wireless transmitter with 2 mic/line integrated mix channels, giving you the flexibility to create your own monitor mix. The TransMixer features an audio limiter, front-mounted antenna, and controls for input level and frequency selection. A tri-color LED indicates input level while a second LED indicates the frequency. I/O consists of 2 mic/line, XLR-1/4" combo input channels and 2 XLR split outputs.