Korg RK-100S 37-key Keytar Features: Ergonomically designed keytar gives you total freedom onstage 37 velocity-sensitive keys feel great to play 200 programs create powerful tones for soloing Dual ribbon controllers enable expressive performance 8-note polyphonic synthesizer with 2 oscillators creates a world of tones Battery operation provides up to 8 hours of continuous use Vocoder function lets you accent your playing Includes a handy strap and soft case for storage