The new handhelds in the h4000 series feature a 400MHz XScale processor, 64MB of RAM (55MB of which are available to the user), 32MB of Flash memory, integrated Wi-Fi and Bluetooth networking, an SDIO slot, a 3.5mm stereo audio jack, a 3.5 inch transflective TFT display that supports 65,000 colors and Microsofts Windows Mobile 2003 for Pocket PC operating system. The h4355 features a more powerful battery and the first integrated keyboard found in an iPAQ.