¡¤Chipset: Sigmatel ST4200S ¡¤Standard USB to IrDA adapter support for Windows 98/98SE/ME/2000/XP. ¡¤Supports plug and play. ¡¤Fully compliant with IrDA & USB 1.1. ¡¤Supports three models: SIR(2.4Kbps 115.2Kbps), MIR(576Kbps 1152Kbps) & FIR(4Mbps). ¡¤Does not require external power. ¡¤Supports Hi-speed infrared mode Hi-speed is 4Mbps. ¡¤Wireless connection between all kinds of electronic products. ¡¤Wireless connection between desktop PC and PDA, notebook, digital camera, cellular phone and other mobile devices ¡¤Effective data transfer range is 1.8 metre, Maximum receive angle is 30¡ã ¡¤Operating temperature: 0 to 70 degrees Celsiu