See and Be Seen, Day or Night with Garmin Varia RTL510 

• Provides visual and audible alerts to warn of vehicles approaching from behind up to 153 yards (140 meters) away
• Tail light offers daylight visibility up to a mile away and is visible within a 220-degree range, so drivers can see you well before the radar sees the vehicle
• Sleek vertical design easily mounts to most road-use bicycles, including racing, touring and commuter styles
• Requires a dedicated radar display unit or wirelessly integrates with compatible Garmin devices (sold separately)
• Battery life: up to 15 hours in flashing mode or 6 hours in solid or night flash mode