BenQ Joybook L31 series User Manual page 11

Insert an SD, MMC, MS, or MS Pro memory card by following
the direction indicated on the card to exchange files.
Connect an earphone to the audio output jack to output
sounds.
Connect a microphone to the microphone input jack to record
sounds.
Use the optical drive to access data on various kinds of discs and
enjoy movies or music
Getting started 7