HP iPAQ Pocket PC h4150, 8.89 cm (3.5"), 240 x 320 pixels, TFT, 0.24 x 0.24 mm, 65536 colours, 0.064 GB HP iPAQ Pocket PC h4150. Display diagonal: 8.89 cm (3.5"), Display resolution: 240 x 320 pixels. Internal memory: 0.064 GB, Compatible memory cards: MMC, SD, SDIO. Processor frequency: 0.4 GHz. Operating system installed: Windows Mobile 2003 Premium. Wi-Fi standards: 802.11b https://www.pocket-lint.com/phones/reviews/hp/67705-hp-ipaq-4150-pda-wi-fi Ideal for those looking for something more than the H1900 series and the top of the range H5500 series this fills the gap nicely. http://www.zdnet.com/reviews/pdas/2003/11/03/hp-ipaq-h4150-39117558/ If you liked the slim form factor of the H1940 but were waiting for a device with built-in Wi-Fi, this is it.