1 Echocardiography (echo) is a painless test that uses sound waves to create pictures of your heart.  This test gives your doctor information about the size and shape of your heart and how well your heart's chambers and valves are working.
USB was designed to standardize the connection of computer peripherals (including keyboards, pointing devices, digital cameras, printers, portable media players, disk drives and network adapters) to personal computers, both to communicate and to supply electric power.
Standard USB A to B Cable for Connecting USB Devices to USB Computers. Our USB products are version 2.0 certified to support high-speed data transfer rates. Our USB cable is fully compatible with Windows and Mac computers. USB Cable A plug to B Plug.