HP Compaq NX4820 Maintenance And Service Manual page 9

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Integrated wireless support for Mini PCI IEEE 802.11b and
802.11b/g WLAN device
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Support for one Type II PC Card slots, with support for both
32-bit (CardBus) and 16-bit PC Cards
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External 65-watt AC adapter with 3-wire power cord
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6-cell or 12-cell Li-Ion battery pack
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Stereo speakers with volume up and down buttons
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Support for the following optical drives:
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Connectors:
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Maintenance and Service Guide
DVD+RW/R and CD-RW Double Layer Combo Drive
with LightScribe
DVD+RW/R and CD-RW Double Layer Combo Drive
DVD/CD-RW Combo Drive
DVD-ROM Drive
External monitor
Universal Serial Bus (USB) v. 2.0
RJ-11 (modem)
RJ-45 (network)
Audio-out (headphone)
Audio-in (microphone)
Power
IEEE 1394 digital (select models only)
S-Video-out (select models only)
Infrared (HP Pavilion models only)
Parallel
Serial
Docking (select models only)
Digital memory card reader (select models only)
Product Description
1–3