HP 421 Notebook-PC - Manual (Page 20)

Component Description
(1) SD Card Reader Supports the following optional digital card formats:
● MultiMediaCard (MMC)
● MultiMediaCard 4.2 (MMC Plus, including MMC Plus HC)
● Secure Digital (SD) Memory Card
● Secure Digital High Capacity (SDHC) Memory Card
● Secure Digital High Speed (SDHS) Memory Card
(2) Audio-out (headphone) jack Produces sound when connected to optional powered stereo
speakers, headphones, ear buds, a headset, or television audio.
NOTE: When a device is connected to the headphone jack, the
computer speakers are disabled.
(3) Audio-in (microphone) jack Connects an optional computer headset microphone, stereo
array microphone, or monaural microphone.
Right-side components
Component Description
(1) USB ports (2) Connect optional USB devices.
(2) RJ-11 (modem) jack (select models only) Connects a modem cable.
(3) Optical drive (select models only) Reads optical discs and, on select models, also writes to optical
discs.
(4) Optical drive light (select models only) Blinking: The optical drive is being accessed.
(5) Optical drive button (select models only) Opens optical drive tray.
8 Chapter 1 Features