The RECORDING Lamp USB is a small plexiglass light unit which automatically indicates Recording start/stop and record "ready". You can now choose your own colours with the Recording Lamp USB. The new hardware allows customisation of all three lamp modes: Recording (usually red) and Pre Roll (usually yellow), and Cue can each be a separate colour. This is possible thanks to a new internal RGB design. The unit is powered directly via USB. No PSU or Midi Interface is needed !