THE POLARIZER DIFFERENCE: This image comparison was captured simultaneously with the same video resolution, but only one dash cam features the Garmin Clarity polarizer to significantly increase clarity. Images may not reflect exact picture resolution and pixel quality. PARKING GUARD: Get a smartphone alert when your dash cam detects an incident to your parked car. This requires a paid Vault subscription, active Wi-Fi connection and constant power; some vehicles will require use of the Constant Power Cable (sold separately). LIVE VIEW: When you are away from your parked car, access a live view from your dash cam. This requires a paid Vault subscription, active Wi-Fi connection and constant power; some vehicles will require use of the Constant Power Cable (sold separately). DASH CAM VIDEO SYNC: Get more awareness with more camera viewpoints. View synchronized video clips from up to four dash cams (each sold separately) by using the Garmin Drive app. EXTRA USB PORT: The included charger has an extra USB port, so you can power your dash camera, phone or even your navigation device. DURABLE BY DESIGN: This dash cam withstands harsh vehicle environments, including direct sunlight and heat. MEMORY CARD REQUIRED: This dash cam requires a microSD™ memory card (sold separately) and supports up to 512 GB. CONSTANT POWER CABLE: Certain vehicles will require a Constant Power Cable (sold separately) to enjoy select features that require continuous power to your device.compete with friends and more in the Garmin?Connect™ smartphone app