With built-in driver and USB-powered, the adapter cable is easy to install without AC adapter.Each MIDI port has 3 activity indicators, which is convenient for you to operate.It is made of high-quality copper wire, which is reliable and durable. It provides one MIDI input port and one MIDI output port, with each MIDI port supporting 16 MIDI channels.The length of the product is 1.8m.It supports for Windows 7/10/9/8/SE/ME/2000/XP, for Mac OS 9x and for Vista. It is self-powered and can be conveniently attached to your computer's USB port without the need for tools or computer disassembly. It is the simplest and most convenient way to connect a keyboard or controller to a computer through a USB port. There's no need for additional cables. This interface comes with integral USB and MIDI cables as part of its sturdy construction. It can easily turn your computer into a music studio and give you the power to play songs on your keyboard or other controller, then mix and edit them on your home computer or laptop with any sequencing or recording software you have installed.Item Name: Adapter CableMaterial: Copper WireColor: Black3 Active Indicators for Each MIDI Port: Power On-Red, Play-Green, Record-BlueCompatible Systems: for Windows 7/10/9/8/SE/ME/2000/XP, for Mac OS 9x and for VistaFeatures: USB Powered, Plug Play, Easy InstallationSize Details: Cable Length: 180cm/70.87" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Instructions for use:Connect the cable marked "IN" to the MIDI "OUT" socket of a MIDI keyboard (or MIDI device).Connect the cable marked "OUT" to the MIDI "IN" socket of a MIDI keyboard (or MIDI device).Plug the USB cable into any free USB socket on your computer, the red LED will light to show power on.Open your music software program, for Cubase, for Sonar, MIDI connections, etc.Set the music program MIDI in and MIDI out devices to "USB Audio device"Your USB to MIDI interface is now ready for use.To save potential problems, it is recommended that this interface is always connected to the same USB as it was original installed on to prevent multiple installation of the driver.Package Includes:1 x Adapter Cable