The Garmin Varia RearVue 820 is an advanced rear-facing bike radar and tail light designed to help cyclists ride with greater awareness and visibility. Using built-in radar technology, it detects approaching vehicles from up to 175 meters behind and sends alerts to compatible Garmin Edge devices or smartphones. The bright rear light offers multiple modes—including solid, peloton, night flash, and high-visibility day flash—so riders can stay seen in different riding conditions. With a wide 220° visibility angle, long battery life, and smart features like brake light activation and vehicle threat detection, the Varia RearVue 820 provides an extra layer of safety for road cyclists and commuters.
