MIDI keyboard,Portable Usb 9 Usb 9 Slim-line Midi Siuke Lanru Musical Slim-line I Qahm

1 rotary knob for tone adjustment 1 slider for volume adjustment. 2 buttons for sending settled control message.(controller number: 64/67) Plug and Play USB 2.0 cable, no need of driver installation. USB bus powered - no additional power cable needed. Plug and Play USB 2.0 cable, no need of driver installation. 1 rotary knob for tone adjustment. 1 slider for volume adjustment. 4 programmable memory banks.