Amprobe USB Adapter Converts the USB port of a PC to RS-232, Supports Windows 95 (OSR2X), 98, 2000, ME, XP, Vista, Mac 8.6 and higher, Works with Amprobe instruments with download capabilities, Works with many other products with USB ports, including cameras, Palm Pilot, card readers, mouse, security systems, etc. and Frees up the serial port for other uses.