Ettus Research is a company known for developing software-defined radio (SDR) technology. Founded in 2004, it specializes in creating hardware and software solutions that allow users to transmit and receive radio signals across a wide range of frequencies. Their products are widely used in research, education, and industry for applications such as telecommunications and signal processing. One of their most popular products is the USRP (Universal Software Radio Peripheral), which provides a flexible platform for building custom radio systems. Ettus Research is also recognized for its contributions to the GNU Radio project, an open-source software toolkit that enables users to create SDR applications easily.