Trek CarBack USB Rechargeable Radar Rear Light

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- carback can detect and alert riders of rear-approaching vehicles from up to 240 m away- compatible with most cycling gps computers- pair carback with the trek accessory app to see a vehicle's rear-approaching and passing distance on your smartphone- designed with focus, flash and range to be daytime-visible from up to 2 km away- four light-flash modes: day flash 90lm, day steady 25lm, night steady 5lm and night flash 5 lm- visible fuel gauge leds make it easy to see the carback's 7+ hour battery status- ipx7 waterproof rating to confidently ride through wet conditions- includes quick connect plus rear mount and usb-c charging cable