How do dash cams work?

Dashcams work by recording footage while you are driving. Some dash cams also have motion sensors that start recording if there is activity outside the car. The majority are powered by the car’s battery, although some models can be plugged into an AC outlet. They typically come with a mount for the windscreen or dashboard and are positioned to record footage of the driver and the road ahead. When activated, dash cams start recording video automatically. Many use a microSD memory card to store footage. You can remove the card and copy footage to your computer, or use Wi-Fi on some models to download footage wirelessly.