Garmin Varia RearVue 820, Advanced Rearview Radar & Tail Light, Enhanced Visibility & Awareness for Cyclists, Advanced Vehicle Tracking & Brake Light (010-03180-00) | Wearable4U PowerBank Bundle

Varia RearVue 820 is a rearview radar and tail light that alerts cyclists to approaching vehicles via their compatible cycling computer, smartwatch, or app. It offers up to 24 hours of battery life in day flash mode and up to 30 hours in radar-only mode.

• The description claims the radar can detect vehicle size and threat level with a wider field of view.
• The description claims the tail light is visible from up to 2 km (1.24 miles) away.
• The description claims same-speed tracking is limited or may be unavailable at slower speeds or when the radar cannot detect the road.