Garmin Varia™ RearVue 820

ANT+® Yes (radar, bike lights) Dimension 98.9 x 25.9 x 43.2 mm (3.9” x 1” x 1.7") Weight 90 g (3.2 oz) Light modes Solid, peloton, night flash, day flash Custom light mode configuration Yes (with Varia Mobile App) Radar-only mode Yes Lumens 25 solid, 8 peloton, 40 night flash, 100 day flash Water rating IPX7 Battery life 10 hours solid 15 hours peloton 10 hours night flash 24 hours day flash 30 hours radar-only BLE Yes (radar, bike lights) Viewing angle 220° Visibility distance 2 km Rear tail light Yes Brake light Yes Rear radar Yes Lateral vehicle positioning Yes Vehicle size classification Yes Vehicle threat classification Speed-, size- and lateral range-based Maximum vehicle detection range 175 m Radar beam width 60°