Lenovo IdeaCentre B305 - Manual (Page 11)

6
User Guide
1.5.2 Connect the keyboard cable to the appropriate keyboard
connector (PS2 connector or USB connector).
1.5.3 Connect the mouse cable to the appropriate mouse
connector (USB connector).
1.5.4 If you have audio devices, attach them using the
following instructions:
1 2
Microphone Use this connector to attach a microphone (purchased separately)
to your computer when you want to record sound or if you use
speech-recognition software.
Headphone Use this connector to attach headphones (purchased separately)
to your computer when you want to listen to music or other
sounds without disturbing anyone.