A car dash cam is a small, onboard camera mounted inside a vehicle, typically on the dashboard or windshield, that continuously records the view through the vehicle's front windscreen and sometimes rear or other windows. Dash cams can provide evidence in the event of an accident, help with insurance claims, and capture unexpected events while driving.

Dash cams can provide crucial evidence in case of an accident, helping to determine fault. They can also protect against insurance fraud, capture incidents of road rage, and record your journey for security or personal interest. Some insurance companies may offer discounts for vehicles equipped with dash cams.

Dash cams are designed to automatically start recording when the car's ignition is turned on and stop when the engine is turned off. They continuously record video on a loop, overwriting the oldest footage when the memory card is full, unless a clip is saved due to an event like a collision.

Yes, many dash cams have a parking mode feature that allows them to continue recording even when the car is parked. They typically use motion or impact sensors to activate and record footage if there is movement or an impact detected around the vehicle.

Key features to consider include video resolution (1080p is standard, but 4K offers higher quality), loop recording, g-sensor (for impact detection), parking mode, wide-angle lens, night vision, and GPS integration for location tracking. Additional features might include Wi-Fi connectivity for easy video transfer and dual lenses for front and rear recording.