Controlling your DMX lights from your computer requires an interface. The Open DMX USB is the lowest cost interface available. Designed for the budget conscientious user who does not require the added features and protection of the DMX USB Pro Mk2. Compatible with a reduced set of programs compared to the DMX USB Pro Mk2 it will still allow control of 512 channels. USB 2.0 input and single DMX512 output (non-isolated), RDM is not supported on this device Downloadable Documentation: Recommended Apps: