Cobra ESR800 12-Band Radar Detector With LED Icons And Voice/ ESR 800 Safety Alert - Warns driver of emergency vehicles and road hazards from systems equipped with Safety Alert transmitters UltraBright Data Display - Easily recognizable display with band identification icons City & Highway Modes - Selectable operating mode reduces falsing in densely populated areas Auto Mute - Automatically mutes the alert tone for enhanced driver convenience Voice Alert - Provides the user with specific band voice annunciation