AOR scanners are electronic devices used for receiving and monitoring radio communications. They are commonly used by amateur radio enthusiasts, aviation enthusiasts, and emergency services personnel. AOR scanners are designed to tune into a wide range of frequencies, allowing users to listen in on various types of radio transmissions. These scanners often have multiple channels and can scan through them quickly, making it easy to monitor different frequencies. AOR scanners also typically have features such as programmable memory channels, signal strength indicators, and the ability to store and recall frequencies.