The best antenna for you will depend on the frequencies you want to listen to and the environment in which you will be using the scanner. Antennas are also available in a variety of sizes and types. Scanner receivers are available in a variety of models, ranging from simple hand-held units to more complex desktop models. To use a police scanner, you will need a scanner receiver, an antenna, and a power source. In Carol Stream, Illinois, police scanners can be tuned to frequencies in the 800 MHz band. The specific frequencies used by law enforcement agencies vary from jurisdiction to jurisdiction. In the United States, police scanners typically operate on frequencies in the VHF (very high frequency) and UHF (ultra-high frequency) bands. Police scanners are a popular tool for amateur radio enthusiasts, journalists, and anyone else who wants to stay informed about what is happening in their community. This allows users to listen to live radio traffic, including calls for service, descriptions of suspects, and updates on ongoing investigations. A police scanner is a radio receiver that can tune into the frequencies used by law enforcement agencies.