The TSC-9A is a multi-use interface cable terminated with a USB A connector and a male BNC (bayonet style) connector. The cable is used to connect various Telonics products to a computer when using Telonics Product Programmer (TPP), Telonics Data Converter (TDC), or the CR-2a BCP-2 programming software. The BNC connector allows quick and easy attachment of various adapters.