You can use the microphone Bit like a small megaphone or even to turn sounds into light or motion! This Bit translates sounds into a language that littleBits circuits can understand. HOW IT WORKS The microphone Bit takes sound from its environment and translates it into the electronic language of littleBits. Make sure the switch is set to sound when youre using it with the speaker and other for all your other Bits like LEDs and motors. The microphone Bit also has a 3.5 mm input jack so you can plug in your computer or mp3 player.