The Enersound CS-300 system uses cables with 7-pin DIN connectors. Both chairman and delegate units come with a 6.6ft (2m) cable attached. These special cables are also sold in various lengths and are available in 9.8ft (3m), 16.4ft (5m), 32.8ft (10m) and 65.6ft (20m.) Cables can be interconnected for longer lengths. Extension cables are recommended for greater flexibility in different microphone layouts.