BenQ Joybook R46 Series User Manual page 12

Connect an earphone to the audio output socket to output
sounds.
Connect a microphone to the microphone input socket to
record sounds.
8 Getting started
Connect digital camcorders and high-speed storage equipment
to this IEEE 1394 (FireWire) port.
Use the optical drive to access data on various kinds of discs and
enjoy movies or music.