Garmin Forerunner 735XT - Black & Gray Run-Bundle Run Bundle - comes with the HRM-Run monitor to measure cadence, vertical oscillation and ground contact time Built-in activities - data support for: running, cycling, swimming, multisport, hiking, xc skiing, strength, paddle sports and cardio. Battery : Rechargeable lithium-ion 24/7 Heart rate monitoring - Elevate wrist Heart rate gives you heart rate all day and night -no additional strap required - Activity Tracking Accuracy (go to garmin.com/at accuracy) Connected Features - automatic uploads to Garmin connect, Live Tracking, audio Prompts, music controls, Smart notifications and social media sharing Smart notifications - get any notification from your phone all with vibration so you dont miss a thing - When paired with a compatible smartphone (go to garmin.com/ble)