The Blueberry Audio +IR Board is uses to listen for sound, produce sound and also has some interesting IR functionality. It has a Piezo Buzzer and a MEMS microphone. It also has an IR transceiver. The IR transceiver can be use as a beam break or proximity detector, it can also read code from TV remote controls!

Thing on this board:

1 x Buzzer

1 x Microphone

1 x IR Transceiver