The Frederick Scanner Pro is a live audio stream of Frederick, Maryland Police, Fire, Rescue, and Highway communications. Just start the app, press the play button and youre tapped into the Frederick scene. Choose "Fire Feed" and youll hear only Fire, Rescue, EMS communications. Choose the "Airport Feed" to listen in on the local FDK Airport communications. All the other Fire/Police feed apps use services like Broadcastify and are delayed 1-2 minutes but the FredScanner Pro audio is delayed by on a few seconds! The Pro version includes: - CarPlay enabled - Switch between our Main feed, Fire feed and FDK Airport - Vastly improved audio - No audio delay - FredScanner Latest Incidents - Live traffic reports - Various Frederick County Webcam shots - Live MDSHA Traffic Cams This app is very useful if you live, or are in, Frederick, MD, USA. **This app streams audio from the internet, please check your cellular data plan before using.