HP iPAQ hx2790c Pocket PC. Display diagonal: Transflective TFT QVGA color with LED backlight with power save mode, Display: TFT, Pointing device: Stylus; Touch screen. Processor clock speed: 624 MHz, Processor family: Intel PCA, Built-in processor: Intel PXA270 Processor. Mobile operating system provided: Microsoft® Windows Mobile™ 5.0 for Pocket PC, Premium Edition, Bundled software: Outlook Mobile; Microsoft ActiveSync 3.7.1; Microsoft Reader eBooks. Wireless technology: 802.11b; Bluetooth. Battery type: Removable/rechargeable 1440 mAh battery