9 MIDI control groups: 9 knobs + 9 sliders + 9 buttons. 4 programmable memory . 6 transport buttons: Rew, Play, FF, Loop, Stop, Rec. 2 assignable buttons: used as MIDI CC switches. 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. : Support for Win 10 / for Win 8 / for Win 7 / for Win XP / for Win Vista / for OSX. Color: Black Material: plastic Package Contents: 1 x MIDI Slim-Line Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.