Bluetooth controller for iPhone / iPad / Mac and Windows with 25 velocity keys, 8 illuminated trigger pads and X / Ψ touch axis. It has Octave +/- function, sustain switch, pitch and modulation, Tap, Arp. Connection with usb micro for Mac / PC and Bluetooth for connection to iPhone and iPad. Supported operating systems: iOS8 and later for iPhone / iPad, Yosemite OSX 10.10 and above, PC windows 7.1 SP1. Operates on 2 AAA alkaline batteries. Includes USB connection cable and a KORG suite of programs. Weight 471 gr