Performance GPS Cycling Computer with Mapping and Touchscreen Dynamic performance monitoring provides insights on your VO2 max, recovery, training load focus, heat and altitude acclimation, nutrition, hydration and more?1; Cycling safety features?2; include new bike alarm, group messaging and tracking, incident detection and compatibility with Varia™ rearview radar and lights so you can see and be seen Includes routable Garmin Cycle Map with popularity routing — which helps you ride like a local — plus on-device route creation, off-course recalculation and back to start; mountain biking model has integrated Trailforks data, including trail difficulty ratings Customize with free apps, widgets and data fields from the Connect IQ™ Store MTB dynamics track jump count, jump distance and hang time as well as Grit, a measure of the ride’s difficulty, and Flow, which tracks the smoothness of your descent so you have a score to beat next time Battery life: up to 20 hours with GPS; extendable up to 40 hours with the Garmin Charge™ power pack or in battery save mode