In his latest review, DesFit takes a detailed look at the new Garmin Varia RearVue 820, breaking down what Garmin improved and who this upgrade is really for. Released in February 2026, the RearVue 820 builds on Garmin’s radar legacy with a brighter 100-lumen tail light, expanded 175-meter vehicle detection, brake light functionality, and more advanced vehicle tracking when paired with compatible Edge computers or the Varia app. Des dives into real world usability, battery life, and whether the added features justify the price compared to previous Varia models and competing radar units.