The SDGPS for Pocket PC works with SDIO enabled Pocket PCs running Pocket PC OS 2002 or Windows Mobile 2003. The company's web site lists the product as compatible with iPAQ H1937, H2210, H3950, H3970, H5450 and H5550. For the H39xx and H5450 the SDIO patch is required (or the upgrade for Windows Mobile 2003). SDIO Now! from BSQUARE is the technology used in this product.