A "next" source and preview accessory for the SE-800 switchers, the RMC-140 will display your choice of next source, quad split with colored indicators, PIP, or POP. Included tally lights are connected and powered by 1/8” phono plugs or Tally Out DB15 connections. If you plan to use RMC-140 to drive tally lights on TLM-404, TLM-702 and the ITC-100, you will need a 2M/1F DB 15 cable P/N DV-15. Please also look at RP-7 which is a rack mounted version of the RMC-140.