Casio CTK-2000 Premium Keyboard Pack with Power Supply, Keyboard Stand and Professional Closed Cup Stereo Headphones 61 piano-style keys 400 Tones 48-note polyphony (maximum) 150 Rhythms Package includes Yamaha Power Supply, Keyboard Stand and Professional Closed Cup Stereo Headphones 61 piano-style keys 48-note polyphony (maximum) Package includes Yamaha Power Supply, Keyboard Stand and Professional Closed Cup Stereo Headphones 150 Rhythms; 400 Tones