Yamaha PSRE333MM 61-Key Portable Keyboard 61 full-sized, touch sensitive keys - Develop better piano technique with full-sized keys XGLite/GM compatible - Can playback tens of thousands of commercially available files Two built-in digital signal processors - Recording studio effects like reverb and chorus add depth and realism to the sound 100 Preset Styles - Great for jamming. Spice up practice time by playing to a cool drumbeat instead of the metronome USB to HOST - Easy computer connectivity