M-Audio Uno 1-In/1-Out USB Bus-Powered MIDI Interface

Features
1-in/1-out MIDI interface
16 MIDI input channels
16 MIDI output channels
Bus-powered—requires no external power supply
Extremely compact and lightweight for mobile or desktop use
Built-in USB and MIDI cables
Specifications
Size/weight: 3-1/2” (w) x 7/8” (h) x 1-13/16” (d) x 116″ (cable); .075 lbs.
Requirements
Compatibility
MME
Mac OS X Core MIDI

Minimum System Requirements (PC)
Windows 98SE / Me / 2000 (SP4) / XP (SP2)* / Vista (32 bit) / Windows 8, 8.1 and Windows 10

* Home and Professional Edition only. Windows Media Center Edition is not supported.
Minimum System Requirements (Mac)
OS X all instances up to 10.12.1