M4U XT - a compactUSB 2.0 MIDI interface with 4 inputs, 4 outputs, perfectly optimized for usage with Windows Vista, Windows 7, Windows 8.1 and Mac OS X. M4U XT can be used directly in all current music applications, not only under Windows Vista, Windows 7 / 8 / 8.1 / 10 (32-bit / 64-bit) and Mac OS X but also under Windows XP - even without any driver installation! The compact 1/3 rack size box (that is even smaller than the previous model), USB bus power support and Plug-n-Play installation make M4U XT truly easy to use and easy to carry everywhere you go. M4U XT simply works perfect in any studio environment with its 64 input MIDI channels and 64 output MIDI channels. M4U XT also provides full multiclient support by installing the optional downloadable driver for Windows XP, Vista, 7 & 8.1. You can even connect multiple M4U XT units to one computer. Dimensions: 14,5 x 8,5 x 4,5 cm. Color: White/Grey.