The dual car camera has a 4.5″ display mirror. The mirror display screen has 3 view modes, switch the view mode quickly from either full screen/front/rear views or pictures in picture display. And the half-screen display design will not prevent you from seeing the back view while driving. And the 4.5″ mirror dual dash cam features night vision, providing you with clear images even at night or in dark. A dual-lens dash camera simultaneously captures the road front (170 degrees) and back rear (120 degrees) in crystal detail. In addition, the front scar camera is designed with a parking monitor, which will automatically turn on and record when parking. Variable sensitivity gravity-sensor auto detects a sudden collision and emergency, which will lock the video to “SOS File” to prevent that video from overwriting. This seamless loop recording overwrites the oldest footage with the newest while the card is filled (Max support 32GB). Also, the parking guideline will help you park safer and faster