RTL-SDR

RTL-SDR (Realtek Software Defined Radio) is a low-cost device that allows you to receive and listen to a wide range of radio signals using a computer. Instead of relying on traditional radios designed for specific frequencies, RTL-SDR acts as a versatile receiver that can tune into various signals such as public radio, aircraft communications, weather satellites, and more. It connects to your computer via USB and, with free software, enables you to explore electromagnetic signals across a broad spectrum, making it a powerful tool for hobbyists, researchers, and enthusiasts interested in radio frequency analysis.