16 MIDI input channels and 16 MIDI output channels LEDs indicate power, MIDI input signal, and MIDI output signal USB bus powered, no external power required Compatible with Windows XP, Windows 7 Cable length: 2.0 m (6 ft) How to use: Connect the "IN" to the MIDI "OUT" jack of a MIDI keyboard or device Connect the "OUT" to the MIDI "IN" socket of a MIDI keyboard or device Plug the USB cable into a free USB port on the computer The red LED lights up to indicate power Open your music software such as Cubase, Sonar, or other MIDI applications Set the MIDI input and output devices to "USB o Device" Your USB MIDI interface is now ready for use Material: Plastic Color: As shown Included: 1 x USB MIDI interface cable Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.