.The USB port with Test access is an electronic part manufactured by Gossen Metrawatt. It is a universal serial bus (USB) interface that enables high-speed communication and data transfer between peripheral devices and a host computer. The USB port with Test access can be used to connect a wide variety of devices such as printers, scanners, external storage devices, digital cameras, video recorders, and many more. It is available in four different models (GM-K852A, GM-K853A, GM-K854A, GM-K855A) and is designed to provide reliable and error-free data transfer with a maximum data rate of up to 480 Mbps. The USB port with Test access also provides superior electrical performance, great power-handling ability, and resistance to interference. It is backwards compatible with USB 1.1 devices.