Features: 12 backlit velocity-sensitive trigger pads. 2 assignable buttons: used as MIDI switches. 4 banks for different settings. 6 control buttons: Rew, Play, FF, Loop, Stop, Rec. 1 slider for adjustment. Plug and Play USB 2.0 cable, no need of driver installation. USB bus powered - no additional power cable needed. Specifications: Color: Black Material: Operating system: Support for Win 8 / Win 7 / Win XP / Win Vista / OSX. Item size: 34 * 10 * 2cm / 13.4 * 3.9 * 0.8in Item weight: 461g / 16.3oz Package size: 39 * 11 * 4cm / 15.4 * 4.3 * 1.6in Package weight: 587g / 20.7oz Package List: 1 * MIDI Pad Controller 1 * USB Cable Note: The slider just for adjustment, not for edit.