Features: This 23" smart concert ukulele is specially designed for beginners. It features LED lights on ABS fretboard to show the play locations, and players just follow the lights, then they can play a song. It also adopts APP video shows and games to help beginners to learn to play ukulele quickly and easily. The APP videos include different teaching modules of ukulele, the beginners can learn it gradually, and the games are making learning more interesting. It is also suitable for current players to further their ability.