Use your Mac or Windows computer to control your DMX lighting setups with this USB To DMX Adapter Cable from Vista. The cable connects to your computer's USB port, powering the conversion of the signals, and it features two LED indicators to show DMX activity and whether the input is selected. The cable supports up to 512 DMX channels, and the actual number of channels available is determined by a separate dongle and software pack, which are not included with the cable.