Garmin RTL515 Rearview Radar with Tail Light

The Garmin Varia Rearview Radar RTL515 pairs up with your Garmin Edge bike computer to alert you to approaching vehicles from the rear. The sensor has a 140-metre range and its rear light can be seen from up to 1 mile away.
Garmin Device and Smartphone Compatible Cycling Radar and Tail Light
In addition to being compatible with your Edge computer, the Varia radar device can also pair up with your smartphone. The Garmin Varia smartphone app provides sound and vibration alerts, plus bold graphics to inform you of the speed and position of any vehicles that are approaching.

Bike Safety Radar and Rear Light with Long Battery Life
With its compact, vertically mounted shape, the Varia mounts easily on the seatpost of most bikes. It also has a long battery life, lasting up to 7 hours between charges.

Additional Specifications:

• Modes: Solid, peloton, night flash, day flash
• Lumens: 20 solid, 8 peloton, 29 night flash, 65 day flash
• Battery Life: 6 hours solid, 8 hours peloton, 6 hours night flash, 16 hours day flash
• ANT+®: Yes
• BLE: Yes
• Water Rating: IPX7
• Viewing Angle: 220 degrees