The ACTiSYS ACT-FR01U is a USB infrared adapter compliant with IrDA standard 1.0 (SIR). The device supports standard data transfer speed (9.6 kbps, 19,2 kbps, 38,4 kbps, 57,6 kbps and 115,2 kbps). The maximum working distance is 100cm (minimum: 3cm).
The driver necessary for MS Windows is supplied with the adapter. The adapter can be integrated easily. The IrDA function of this adapter is provided by a MOSchip MCS7784 IC. Linux drivers are also available for that type of IC.
Helpful hints for this adapter type:
IrDA adapter using MOSchip MCS7787
This adapter has been successfully tested to work with the Polar brand watches S610i and S625x.
Bulletin Board confirmation for compatibility with Polar 710i watch (as well as S710 and S810):http://www.mtb-news.de/forum/showpost.php?p=4951073&postcount=9 (German Language)
For Windows 7 64bit support please see ACT-IR2002UL, which is based on MosChip 7780.