As the technology is evolving so are the police scanners. The newest models are equipped with more variations but are easier to use and operate effectively. However, the devices are complex enough to reduce unwanted access and ensure proper monitoring of the public safety. Many recent models allow one device to be set to different frequencies if the scanner is to be used by multiple operators. A single memory bank can be assigned to police frequencies, another to air traffic control and another one to marine communications. The frequencies can be alternatively switched as needed. Because of the modern microprocessors, the information is rapidly processed. Modern scanners also allow the user to enter thousands of various frequencies and store them in separate memory banks. Recently introduced database-driven scanners have alleviated the need for the operator to be familiar with the radio systems. Typically, only the zip code needs to be entered for the scanner to recognize all available radio channels within the area. If the device is attached to the Global Positioning System (GPS), the scanner will automatically update itself as the operator travels. Most new scanners come equipped with weather radio band allowing the user to listen to current weather broadcasts via transmitter. External or extendable antennas can also be installed for better performance. In addition, several models of police scanners come with programmable search functions allowing the user to find active frequencies by searching the Internet. A wide range of police scanners for sale at BearCatWarehouse.com is offered with custom designed components.