The pro-3450: full featured remote with pop detectionremote installation - installs out of sight poptm mode detection intense blue text display - vertical or upside down display options easy-to-understand real voicetm - using the optional voice module outdoor temperature/battery voltage displays flexible installation options - display unit can mount on/under or in a dash! stay alerttm total band protectiontm three (3) city modes tutorial modedisplay and mounting options for pro-3450:vertical, normal or upside down selectable display. on-dash, under-dash or in-dash installation.