The 88 LC is a cable to allow daisy chain connection to other MR 88 mixers. Microphone mixer has link in/out - daisy chain capability when more than eight microphones are needed, the MR 88 can be daisy chained via the link in/out connectors, with other MR 88 mixers. This will create a multi-mixer system with audio and control passing throughout the system. All audio and control data is carried by link cables, from 8-pin RJ45 connectors at the rear of the mixer (this is a 1 to 1 link). This must be a screened CAT 5E cable (STP).