Black - USB to MIDI Converter Cable Adapter Keyboard Interface Music MINI USB Adapter Easy to install with built-in driver; USB powered, no AC adapter needed. 1 in + 1 out MIDI interface; 16 MIDI input channels & 16 MIDI output channels. LED power indicator; MIDI in & out signal indicator. Supports: Windows and Mac. Turn your PC into a music studio by connecting a music keyboard to your computer with the USB MIDI cable.