The Korg Kross 2 88 Key Synthesizer Workstation is the big brother of its 61 key version. The Korg Kross is filled with a giant library of sounds that leave previous generation models behind & is ideal for a broad range of musical styles. Let the Korg Kross provide you with inspiration with its own built-in arpeggiator & step sequencer to get your creative ideas flowing. The Korg Kross can be plugged straight into your PC or Mac via USB (Universal Serial Bus) & runs just like a software synthesizer plug in or can be used on the go due to its battery powered capability making it perfect for both studio use & live performances. Other than the 61 key version the 88 key version features natural weighted keys giving it the more realistic feel of the piano.