Dash cam dictionary

A CPL (Circular Polarising Lens) filter is an optional accessory that fits over the dashcam's lens to reduce unwanted reflections and glare from the windscreen and dashboard. By filtering reflected light, a CPL filter can improve image clarity, increase contrast, and make details such as vehicles, road markings, and scenery easier to see—particularly in bright, sunny conditions. While it slightly reduces the amount of light entering the lens, a correctly adjusted CPL filter can significantly improve daytime video quality in many vehicles.

Dashcam cabling refers to the different types of cables used to power the dashcam and connect additional cameras or accessories. Depending on the model, these may include power cables, hardwire kits, rear camera cables, coaxial cables, USB cables, or Ethernet-style cables. Each cable is designed for a specific purpose and is not always interchangeable between brands or models. Using the correct cabling ensures reliable operation, supports features such as parking mode, and allows compatible accessories and additional cameras to function correctly.

Bluetooth provides a fast, low-power connection between your dashcam and smartphone, making it quicker and easier to connect through the manufacturer's app. On compatible models, Bluetooth is typically used to establish the initial connection, after which the dashcam automatically switches to its faster Wi-Fi connection for viewing live footage, downloading recordings, and changing settings. Bluetooth can also be used to connect compatible accessories, such as wireless emergency record buttons or remote controls, allowing you to manually save important footage without reaching for the dashcam.

ADAS (Advanced Driver Assistance Systems) uses the dashcam's camera and intelligent software to monitor the road ahead and provide real-time driving alerts. Depending on the model, ADAS features may include lane departure warnings, forward collision alerts, front vehicle movement notifications, and speed camera warnings. These features are designed to enhance driver awareness, encourage safer driving habits, and provide an extra level of confidence on the road, particularly during long journeys or in busy traffic.

Many modern dashcams include built-in Wi-Fi, letting you connect your phone for live view, playback, and quick downloads. The Wi-Fi type affects how fast and stable that connection is. 2.4 GHz Wi-Fi offers the longest range and works through walls, but it’s slower and best for basic tasks or short clips.5 GHz Wi-Fi is three to five times faster, ideal for downloading large Full HD or 4K files, though it works best when you’re close to the vehicle.Wi-Fi 6 is the newest and fastest option, providing the most stable connection, reduced lag, and excellent performance when transferring big files or...