LIU Suitable for ‘Music on Hold’ and ‘Public Address’ RJ Sockets ( Changeable cords ) A tiny 54x26x24mm, Grey Colour. Cords available are; 3.5Mono – 3.5 Stereo – RCA – RJ12 – 6.3mm Phono. Please specify your cord requirement. There are some limitations. If NOT specified we will supply 3.5 Stereo on the Music end and RJ12 on the system end.