Garmin Varia Rear Vue 820 Radar Taillight Advanced radar, sleek design, better than ever before. One of the most advanced rear radar/taillights ever made, the Garmin Varia Rear Vue 820 Radar Taillight gives riders a powerful, reliable radar system with advanced vehicle tracking features, paired with an ultra-bright and customizable rear light to keep them visible. The Varia Rear Vue 820 builds off of the ultra-popular Varia RTL515, with a completely new device that allows riders to detect vehicles from up to 500+ feet away, with a wider field of view than previous models. Advanced Vehicle Tracking allows riders to see small, medium, and large vehicles, while the Varia Rear Vue 820 can also send a notification when vehicles change lanes, and display the threat level of each vehicle as it approaches. All of this functionality is built into an all-new, sleek, compact design that fits on virtually any road or gravel bike, charges with USB-C, and has up to 24 hours of battery life. It's never been easier to stay safe out there. Features Advanced vehicle tracking can individually detect small, medium, and large vehicles, see when a vehicle changes lanes, and detect a vehicle's threat level, easily visible on your compatible Garmin Edge(R) cycling computer or Varia(TM) app Brighter tail light than the RTL515, visible from up to 1. 24 miles away, while a built-in brake light lets other riders know when you're slowing Compact design takes up less space without compromising features, and is also compatible with the Varia seat rail mount kit for an integrated look (sold separately)Custom light modes with various brightnesses, light patterns, and timing, all easily customizable within the Garmin Varia app on your smartphone USB-C charging for increased compatibility, faster charging, and a more future-proof cable interface Specifications Weight3. 2oz / 90g Max Lumen Output100 lumens (Day Flash)Included in Box Varia Rear Vue 820 radar tail light, mounting kit, charging cable, documentation Battery Life Up to 24 hours Device Compatibility Optimized for use with Garmin Edge computers and smart watches, compatible with | Garmin | Varia Rearvue 820 Radar Taillight Rearvue 820