This USB smart Cable connects with A&D serial devices with RS232C output to USB ports or connectors. The Smart cable features one RS-232 mini plug, one USB series A plug, and a USB chip. This cable works with the UC-321 Precision scale, The UA-767PC BP monitor and the TM2430 ABPM. The smart cable requires installation of software drivers to function. The smart cable is required to use A&D medical wired serial devices with Microsoft Health or with Doctor Pro 3 software.