CRFS is a company based in the United Kingdom, established in 2007, and operates within the manufacturing sector, specifically focusing on telecommunication equipment and electrical/electronic manufacturing. The company specializes in providing advanced radio frequency (RF) solutions, particularly in the areas of spectrum monitoring and air defense. CRFS has developed passive detection and geolocation systems that enhance military air defense capabilities, enabling the monitoring and classification of unmanned aerial vehicles (UAVs) across extensive areas, which is critical for national security. The company’s RFeye technology is utilized in various applications, including managing spectrum at large events, as evidenced by its collaboration with the Telecommunications and Digital Government Regulatory Authority (TDRA) during the World Expo in Dubai. This partnership involved deploying ultra-sensitive RF receivers to ensure seamless communication and compliance with local spectrum regulations. With a workforce of 201-500 employees and an annual revenue of approximately $93.7 million, CRFS continues to address complex challenges in spectrum management and defense operations.