Casio CTK-2100 61-Key Portable Keyboard Package with Headphones, Stand & Power Supply Easy-to-play keyboard 61-key portable keyboard with wide range of tones, rhythms and learning capabilities Premium package includes professional closed-cup headphones, single x-braced stand, and World Tour brand power supply 400 high-quality tones, 150 rhythms and auto accompaniments for Latin music Voice Pad allows you to play sampled sounds; connect CD or MP3 player for practicing along with favorite songs Powered by 6 AA batteries or included AC adapter