This is a six foot cable that has an RJ45 connector on one end that will connect to the Apex, Apex Classic, or the VDM module and terminates in wires to connect any device that is variably controlled with an analog, 0-10V signal. One wire will let you control up to two devices (or channels). This wire opens up many control possibilities with your Apex. For example, it allows you to take off the shelf analog LED drivers and build your own lighting fixture! Of course this still does take some DIY effort but it makes controlling these devices much easier.
NOTE: For more information please see the DIY forumhere.