Style 1 Description:  Features:  25 assignable velocity-sensitive keys with excellent performance; 8 assignable trigger pads with colorful backlit in working status, comfortable and accurate.  4 MIDI control groups: 4 assignable control knobs plus 4 assignable control sliders; 4 banks for different settings.  8 control buttons: CC Mode, Mod, Bank, Prog, Pitch down, Pitch up, Octave down, Octave up.  USB 2.0 Plug and Play, no need of driver installation; USB bus powered and no additional power cable needed.  Compatible with Win10/ Win 8 / Win 7 / Win XP / Win Vista / Mac OSX; and compatible with CAKEWALK and other mainstream music software.    Specifications:  Color: Black + White  Material: Plastic  Operating system: Support for Win10/ Win 8 / Win 7 / Win XP / Win Vista / Mac OSX.  Item size: 32 * 19 * 3cm / 12.6 * 7.5 * 1.2in  Item weight: 745g / 1.6lbs  Package size: 36 * 22 * 5cm / 14.2 * 8.7 * 2in  Package weight: 970g / 2.1lbs    Note:  Not support for Windows 98, Me, NT and 2000.  G3/G4 accelerator cards are not supported.    Style 2 Description:  Features:  25 velocity-sensitive keys.  8 backlit trigger pads.  4 MIDI control groups.(4 assignable control knobs plus 4 assignable control sliders)  4 banks for different settings.  8 control buttons: CC Mod, Mod, Bank, Prog, Pitch down / Pitch up, Octave down / Octave up.  Plug 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 / Win10/ Mac OSX.  Item size: 32 * 19 * 3cm / 12.6 * 7.5 * 1.2in  Item weight: 742g / 26.2oz  Package size: 34 * 20.5 * 5cm / 13.4 * 8.1 * 2in  Package weight: 879g / 31oz    Note:  Not support for Windows 98, Me, NT and 2000;  G3/G4 accelerator cards are not supported.  The USB keyboard MIDI controller provides you with a fast and easy way to edit parameters. Two banks of each 8 performance pads, for 16 pads in total, can easily be assigned as pads, MIDI CC buttons or Program change switches. It works with for iPAD and other software. The integration of mini Lab and analog lab creates an amazing hybrid synthesizer with excellent functionality and great sound.    Style 3 Description:  Features:  Portable software MIDI controller.  25 note velocity-sensitive USB keyboard.  16 assignable encoders to program or perform.  16 pads (two banks of each 8 pads/buttons).  A shift pad to shift 1-8/9-16 pad.  Pads can send note information, MIDI CCs and program changes.  Access to 8 user presets further expands all of this control.  Pitch and modulation touch strip.  Dedicated octave up, octave down.  With 1/4" footswitch input.  USB interface, adaptable to USB2.0 (full speed).  Works with for iPAD (camera connection kit required).