[A]

12 backlit velocity-sensitive trigger pads.
2 assignable buttons: used as MIDI CC switches.
4 banks for different settings.
6 control buttons: Rew, Play, FF, Loop, Stop, Rec.
1 slider for volume adjustment.
and Play USB 2.0 cable, no need of driver installation.
USB bus powered - no additional power cable needed.

Specifications:
Color: Black
Material: Plastic
Operating system: Support for Win 8 / Win 7 / Win XP / Win Vista / Mac 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 volume adjustment, not for edit.
Chinese and English teaching, easy to understand, easy to learn and use. 61 exquisite black and white keys.