This Piano contains 37 Keys And 8 Tones, 8 Rhythms 4 Percussions Options & Many More Functions To Keep Your Loved One'S Busy For Hours.There are other functions like Song Record And Play Function, Volume Control, Tempo Control, Eight Different Voices / Eight Kinds Of Rhythms makes it more interesting.It Works On Your Smart Phone Usb Charger Option (Charger is not included) Than Dont Worry About Batteries, Microphone Included.,placed at back side of piano. DC cable/Adapter not included.