Worlde Easykey 25 Keyboard Mini 25-Key USB MIDI Controller Musical

25 velocity-sensitive mini-keyboard keys;4 programmable memory banks. 6 control buttons: Edit, Mod, Pitch down / Pitch up, Octave down / Octave up. 1 rotary knob for tone adjustment. Plug and Play USB 2.0 cable, no need of driver installation. USB bus powered - no additional power cable needed. Color: Black Material: Plastic Operating system: Support for Win 8 / Win 7 / Win XP / Win Vista / Mac OSX. Item size: 34 x 10 x 3cm / 13.4 x 3.9 x 1.2in Item weight: 407g / 14.4oz Package List: 1 x MIDI Keyboard Controller 1 x USB CableNote: Light shooting 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.