A Usb In-Out Midi Interface Professional Piano Keyboard To Pc/Laptop/Mac Instructions: 1. Connect the cable marked "In" to "Out" on MIDI keyboard, "Out" to "In" on MIDI keyboard. 2. Plug the USB to Laptop/PC/Mac, LED indicator will show the power on. 3. Open music software program. 4. Set the music software programs MIDI IN/OUT device to USB-Audio-Device. 5. USB MIDI Interface is now ready for use. Attention: - If any quality problem: 60 Days Money-Back 6 Months No-Hassle Replacement Please feel free to E-mail us if any problem. Thanks a lot! MIDI to USB MIDI Interface GREATLINK USB MIDI Interface is a 1 in 1 out USB 16 channel MIDI interface to connect your MIDI compatible controller, keyboard, synthesizer, or drum machine to your computer. USB bus-powered, compatible with Windows and Mac. If your Mac USB Port is USB-C (Thunderbolt 3), please use original authentic USB-C to USB Adapter from the manufacturer or MIDI interface may not work. 6.5ft USB to MIDI DIN 1 In 1 Out Cable 1 x USB MIDI 1 In / 1 Out Interface 1 MIDI in / 1 MIDI out interface, 16 MIDI input output channels. Plugs and play, with a built-in driver and LED indicator. ||Attention||: The device does not transmit sysex data. Ultra low latency MIDI Input and Output. FL studio12, DirectMusic, CoreMIDI, Cubase, Sonar, MIDI Connections, etc. Supported. 6.5ft USB to MIDI DIN 1 In 1 Out Cable, USB bus-powered. Compatible with Windows XP, Vista, Win 7, Win 8, Win 10 and Mac OS X. | Attention: If your Mac USB Port is USB-C (Thunderbolt 3), please use original authentic USB-C to USB Adapter from the manufacturer or MIDI interface may not work.|