The Uniden Digital Base|Mobile Scanner comes equipped with Uniden exclusive features like Advanced Dynamic Memory System Close Call RF Capture Technology and GPS compatibility. It includes support for digital systems including the latest APCO Project 25 Phase II systems. You can stay safe and informed with state of the art NOAA weather access and S.A.M.E. weather alerts that warn you of severe conditions in your area. Enjoy location based scanning and location alerts by connecting this scanner to an optional GPS receiver so you can stay informed when you are on the go.