Every piece of IC memories a world famous song, such as Jingle Bell, Happy Birthday to You and Merry Christmas. It is commonly applied for many kinds of music greeting cards, toys, doorbells, and alarming sets. The ways of touching off are various, and it can drive an LED. The circuit board can be customized. Features: 1) Provide melody IC and voice IC 2) Wide range of supply voltage: 1.2 - 3.6V (melody IC), 3 - 4.5V (voice IC) 3) Melody IC can drive piezo buzzer and LED directly; voice IC can drive speaker 4) Music and the circuit board can be customized