49-key Mini Roll Up Piano ToysA. Standard 49 Simulation KeysB. Tones: 16Tones (0 - 15tone control)C. Rhythm: 10 rhythms (0 - 9 rhythm accompaniment)D. Demo Songs: 6 Demo songs E. Power supply can be used for 4 AA batteries or AC power adapter( There are no batteries or adapters in the suit・ and the adapter is the same as the phone adapte )F.Make use of environmentally friendly silicone・ waterproof