Reviewing System Features 1-7Left side featuresA – PC Card Slot 1 F – Microphone In JackB – Slot 1 Card Eject Button G – Line In JackC – Slot 2 Card Eject Button H – Headphone JackD – PC Card Slot 2 I – Volume ControlE – Fan J – System UnitAudio ConnectorsThe system unit has the following audio connectors: Microphone in jackUse this jack to connect a microphone for recording audio informationin your data files. Line in jackUse this jack to connect a stereo audio device such as a stereoamplifier or a cassette for playback or recording. Headphone jackUse this jack to connect an optional headphone set. Plugging in theheadphone set disables the built-in system speakers.