The ONE Smart Piano Digital Piano 88-Key Hammer Action Upright Piano, Matte Black Standing at the forefront of smart musical instruments as the exclusive Apple MFi-certified smart piano. Coupled with an App to use on your mobile device, The ONE teaches you to master piano play. In demo mode, The ONE can auto-play your favorite music scores. Just follow along with the LED lights. As you practice music on the piano, LED lights will show you the correct notes to play. Connect to headphones to play in the night without disturbing others.