Check the listing for details. Revolabs Executive Elite | 01-ELITEEXEC8 | 8 Channel Audio Conferencing System. Condition: Used. Listed at 19.96 USD. This is the Revolabs Executive Elite 8 Channel Audio Conferencing System, designed to deliver high-quality sound for business and industrial settings. With HD voice features, this system allows for clear and crisp audio communication in conference settings. It is perfect for use in offices and other professional environments where reliable telecom systems are required. The unit is designed for easy use and is compatible with a range of conference equipment.