Mobility Site reviews the HP iPAQ 310 Travel Companion Navigation. HP iPAQ 310 Travel Companion is powered by Windows CE 5.0 with HP dedicated interface. The navigator also features a widescreen 4.3” 800×480 touch sensitive display, Centrality Titan (600 MHz) processor, 128 MB RAM, 2 GB ROM (plus microSDHC slot), Bluetooth 2.0+EDR, miniUSB jack.