Electronics

Know what's coming. Ride with extra confidence with Trek CarBack Radar Rear Light. CarBack's radar helps detect rear-approaching vehicles from up to 240m and provides audio and visual alerts through paired GPS head units for increased on-bike awareness. Built with integrated best-in-class Daytime Running Lights that are visible from up to 2km away, CarBack is a must-have for every cyclist riding on shared roads. - CarBack can detect and alert riders of rear-approaching vehicles from up to 240m 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 2km 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 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

Take open-ear listening to new depths. Swim, run, cycle, and train harder than ever before with open-ear headphones that can withstand all elements. - Open-Ear Design—Patented bone conduction technology delivers audio through the cheekbone, keeping you comfortable and aware of your surroundings in or out of the water. - Internal Music Storage—Load your favorite audio and dive into your workout with 4GB of built-in MP3 storage, holding up to 1,200 songs. Not compatible with Bluetooth or audio streaming services. - 8-Hour Battery Life—Enjoy 8 continuous hours of premium audio while you're cross-training. - IP68 Waterproof Rating—Fully waterproof, Xtrainerz headphones perform in and out of the water. Submersible in depths up to 2 meters for 2 hours. - Comfortable + Secure—An open-ear design enables bud-free listening and keeps the headphones in place for every stroke.