Casio CTK-496

This compact keyboard features 61 full-size keys, Sing-Along function to add to the fun, and a musical information system display with on-screen icons. In addition, it has 100 rhythms to play along with, auto-accompaniment, built-in speakers, 12-note polyphony, a headphone jack, 100 preset tones, a transpose and tuning control, and 100 demo songs. MIDI capable. Powered by 6 AA batteries or optional AD-5 power adapter.