AVer VC520 Pro 2/VC520 Pro/FONE540 optional cable for AVer VC520 Pro 2/VC520 Pro/FONE540 video conferencing systems is a reliable and high quality 20 meters long cable specially designed for the speakerphone and microphone of these systems. This cable provides a stable and high-quality connection, allowing users to freely place equipment at a considerable distance from the central system.