The KO-3057 USB SmartCable is an accessory cable for the A&D Medical UA-767PC and UC-321PL. This cable connects the RS-232C serial data port of these devices to a standard USB port. This cable is a required accessory to use either of these products with Microsoft Healthvault. A&D Medical is a leading manufacturer of home health care products, including blood pressure monitors, personal scales, digital thermometers and stethoscopes. A&D Medical and its LifeSource consumer brand are known worldwide for innovative, reliable products and best-in-class customer service.