16 MIDI input channels and 16 MIDI output channels LEDs indicate power, MIDI signal in, and MIDI signal out USB bus powered; requires no external power Compatible with Windows XP, Windows 7 Cable length: 2.0 m (6 ft) How to use: Connect "IN" to the MIDI "OUT" jack on a MIDI keyboard or MIDI device Connect "OUT" to the MIDI "IN" jack on a MIDI keyboard or MIDI device Connect the USB cable to a free USB port on the computer The red LED lights up to indicate power Open your music software, such as Cubase or Sonar Configure the software to use the correct MIDI input and output devices Your USB MIDI interface is now ready to use Material: plastic Color: as shown Included: 1 x USB MIDI Interface Cable Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Permissible measurement error is +/- 1-3 cm.