The model CK1 is RCA cable assortment kit includes 1ft/3ft/6ft RCA-to-RCA stereo cables and 3ft/6ft RCA to RCA mono molded cables. It is used to connect time code and video to your HORITA unit. 1ft stereo cable is especially convenient for connecting video and time code when using side-by-side desktop or Rackmount HORITA units. Use a mono cable to connect a single feed of either video or time code to your HORITA unit. To connect video you need the RCA-to-BNC adapters found in kit AK1.