Easy to turn your PC into a music studio, start by connecting a music keyboard to your computer with the supplied USB MIDI Cable. Just connect to a computer USB socket for automatic installation of the driver. Supports Windows XP, Vista Win7 and Mac OS X operating systems LED indicate power 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 power supply. 4. Open up your music software program, such as Cubase, Sonar, MIDI connections, etc. 5. Set the music to MIDI in And MIDI-out devices "USB Audio Device". 6.Your USB MIDI interface is now ready for use. Net weight: about 100g Length: about 2 meters Packing size: 14x9.5x2cm 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 shooting 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.