Keyboard
The HP spill-resistant keyboard is designed using a thin layer of Mylar film under the keyboard and a
drain system that funnels fluid through a hole in the bottom of the notebook. This minimizes the risk of
damage to sensitive components underneath. The 101/102-key compatible keyboard features a full-pitch
key layout with desktop keyboard features, such as the isolated inverted-T cursor control keys, editing
keys, both left and right control and alt keys, full separate numeric keypad, and 12 function keys. US and
International key layouts are available. Other features include hotkeys for instant access to power
conservation and brightness, and 19.05 x 19.05 mm key pitch (center-to-center spacing).
Pointing device
ClickPad with gestures support:
Two-finger scroll, zoom, pinch and pivot rotate
Expansion card slots
ExpressCard/34 slot
Supports ExpressCard/34 (34 mm x 75 mm x 5 mm) card sizes
Media Card Reader
Supports SD (Secure Digital), MMC (MultiMedia Card), Memory Stick,
Memory Stick Pro, Memory Stick Duo
*
, xD-Picture card
* Memory Stick Duo Adapters are required and sold separately. Inserting a Memory Stick Duo Card
directly into your notebook could damage the memory card and/or notebook.
Storage
Internal Storage Device
250/320/500 GB 7200 rpm SMART SATA II Hard Drive
750 GB 5400 rpm SMART SATA II Hard Drive
NOTE:
Up to 15 GB is reserved for the system recovery software.
HP 3D DriveGuard
(Windows models only)
The hard drive is mounted directly to the notebook frame, reducing the
transmission of shock to the hard drive. Uses three-axis digital motion
detection with intelligent sensitivity to help protect the hard drive during
normal use from shock and vibration. The digital accelerometer temporarily
halts all data transfer and parks the hard drive when abrupt motion is
detected.
Fixed optical drives
Blu-ray ROM DVD+/-RW SuperMulti DL LightScribe Drive
*
DVD+/-RW SuperMulti DL LightScribe Drive
DVD-ROM Drive
* Support for the Blu-ray DVD drive on configurations with integrated
graphics requires Windows7 or Windows Vista; configurations with discrete
graphics support it with any offered Windows operating system.
QuickSpecs
HP ProBook 4520s Notebook PC HP ProBook
4720s Notebook PC
Standard Features (availability may vary by country)
DA - 13569 Worldwide QuickSpecs — Version 2 — 3.12.2010
Page 7
