The CarBack helps you ride with more confidence with a radar that detects rear-approaching vehicles and a rear light that's visible from up to 2 km away

1. CarBack can detect and alert riders of rear-approaching vehicles from up to 240 m away
2. Compatible with most cycling GPS computers
3. Pair CarBack with the Trek Accessory app to see a vehicle's rear-approaching and passing distance on your smartphone
4. Designed with focus, flash and range to be daytime-visible from up to 2 km away
5. Four light-flash modes: Day Flash 90LM, Day Steady 25LM, Night Steady 5LM and Night Flash 5 LM
6. Visible fuel gauge LEDs make it easy to see the CarBack's 7+ hour battery status
7. IPX7 waterproof rating to confidently ride through wet conditions
8. Includes Quick Connect Plus rear mount and USB-C charging cable