Lightweight and compact with 2.3-inch high-resolution, capacitive touch display that works with gloves and when wet GroupTrack1 feature keeps tabs on everyone in your riding pack Advanced performance monitoring includes VO2 max, recovery advisor, Strava live segments, FTP, performance condition and advanced cycling dynamics2 Built-in incident detection3 included; compatible with cycling awareness accessories such as Varia Vision™, Varia™ smart bike lights and rearview radar Bike-specific navigation preloaded with Garmin Cycle Map for turn-by-turn navigation Edge 820 GPS bike computer is compatible with ANT+® sensors, including speed, cadence and heart rate. For even more performance data, the 820 is also compatible with ANT+ power meters, including Vector™, our unique pedal-based power meter that measures total power, left/right balance and cadence. You can even record cycling dynamics to get a better look at your form, including where your power is being applied on the pedal and throughout the pedal stroke. It also integrates with ANT+ electronic shifting systems and ANT+ bike trainers.