Hape Learn With Lights Harmonica is an innovative children's harmonica designed to teach children the basics of music. It is equipped with a backlight that helps you master five melodies by following the instructions on the panel. The harmonica is powered by a built-in lithium-ion battery, which is charged using the included cable. Toy dimensions: 15 cm long, 5 cm wide and 2 cm high. The toy meets international safety and quality standards.