Thank you for viewing. The item is a Roland A-49 MIDI keyboard. I have confirmed synchronization with a PC and checked the sound output and the function buttons. However, since synchronization with a PC depends on the music production software, I do not guarantee all functions. *Synchronization with a smartphone has not been tested. A separate bus power may be required. As a bonus, I have included a USB cable. Please judge the condition from the photos. - Brand: Roland - Model: A-49 - Connection Type: USB, MIDI OUT - Functions: Transpose, Octave, Modulation Control - Accessories: Cable Thank you for reading.