Easy to turn your PC into a music studio, start by connecting a music keyboard to your computer with the supplied USB MIDI Cable. and high quality. Just connect to a computer USB socket for automatic installation of the driver. Supports Windows XP, Vista Win7 and OS X operating systems LED indicate on,MIDI in signal and MIDI out signal. USB powered and Class Compliant for true plug & play. Make Music recording by connecting a music keyboard to your computer with the USB MIDI cable with input/output. How to use: 1. Connect the "up" to the MIDI "OUT" jack of a MIDI keyboard Cable (or MIDI device). 2. Connect the "OUT" to the MIDI "IN" socket of a MIDI keyboard Cable (Of MIDI device). 3. Plug the USB cable into a free USB port on the computer, The red LED is lit to show the supply. 4. Open up your music software program, such as , Sonar, MIDI connections, etc. 5. Set the music to MIDI in And MIDI-out devices "USB Audio Device". 6Your USB MIDI interface is now for use. Net weight: about 100g Length: about 2 meters Packing size: 14x95x2cm Cable length: 2m Material:Tinned copper wire colour:Black Package Contents: 1 x Converter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.