Garmin Edge 520 GPS Bundle Computer. Here's the competitive edge you've been waiting for. The Garmin Edge 520 is the first device with Strava live segment challenges. Your starred Strava segments and a curated group of Strava's most popular segments automatically sync with the Edge 520 for live feedback during your ride. Receive an announcement when your starred Strava segment is about to begin, up to the second updates of your PR attempt, then instant results once the segment is complete. This aerodynamic GPS bike computer is also packed with advanced analysis features like time in zone, cycling specific VO2 max and recovery time, indoor trainer support, cycling dynamics and in ride challenges through Strava and Garmin Connect segments. Connected features include live tracking, smart notifications and automatic uploads to Garmin Connect. The Edge 520 integrates with compatible Shimano Di2 electronic shifting systems and additional ANT sensors, such as power meters. It's compatible with GPS and GLONASS satellites, so you benefit from more signal options, wherever your ride takes you. The Edge 520 Bundle version includes a heart rate monitor, speed sensor, and cadence sensor for further critical feedback of your training or racing endeavors. The heart rate monitor wirelessly transmits your heart rate info to the Edge 520 for instant feedback on how hard you're working. The wireless speed sensor enables the Edge 520 to keep track of indoor training miles while the wireless cadence sensor enables you to monitor pedaling strokes per minute.