The Autocue CRC-1 Switcher allows you to easily switch between document cameras, PC, DVD players, and portable music players with the press of a button. The module supports bi-directional RS-232 or IR communication, and is pre-programmed with IR codes for 8 leading projector manufacturers for ease of use. Using a microphone as an audio input, you can speak over the existing audio, and the "ducking" feature avoids frequency clashes in your mix which improves audibility. The CRC-1 switcher has a surface mount design for easy integration with other equipment.