The Garmin Varia RTL515 Radar Tail Light is an advanced safety device designed to enhance your visibility and awareness on the road. This tail light combines a bright rear light with radar technology that detects vehicles approaching from behind up to 140 meters away. When paired with a compatible Garmin device or smartphone, the Varia RTL515 alerts you to approaching traffic, providing both visual and audible warnings. The tail light itself offers multiple modes, including solid, night flash, day flash, and peloton mode, ensuring you are seen in various lighting conditions. With its compact design, long battery life, and easy mounting options, the Garmin Varia RTL515 is an essential tool for cyclists who prioritize safety on the road.