A music keyboard produced by Casio. For a non professional product, it's actually really decent. It has 66 non-weighted keys, a 24 note polyphony, GM standard 128 voices, 8 drum kits, and 40 additional spaces for user created sounds. It has an onboard sequencer and synthesizer, and a great key touch. The only thing they messed up on was the pitch bend control. It's a pad, not a wheel, which makes it difficult to get precision bends. Layer/Split tones also.