the one music group, 61-key digital pianos-home, the one light (tok1w) the one music group the one smart piano 61-key portable keyboard white. this portable keyboard is an ideal instrument for beginners and experienced players alike. it is an excellent learner's tool, and a fun way for more experienced players to learn new music. there are 61 backlit keys that light up with sheet music through the one smart piano app. the one light is portable, so you can take it with you anywhere. you can select from over 128 different instrument sounds. carry the piano around anywhere with 6 aa batteries or use the power supply. it is available with a black or white chassis (select from drop-down menu). one key component of the one is the included app, which lets you take private lessons with top online instructors. each lesson is integrated with light-up keys, so it's like having a teacher with you any time. the one light comes with built-in speakers, so you can play any music through third-party apps such as spotify, youtube, pandora, and more. play your own renditions on top of the music. your house can become a live music party-central. in addition to the external player input, the rear panel includes a mic input, pedal input, usb and an audio output for patching into larger amplification systems. this is a fun, versatile and satisfying keyboard that can help you grow as a musician. what’s not to like? note: ipad pictured is sold separately.