Tracking nearly every aspect of your adventurous lifestyle, the Garmin Fenix 3 HR Training Watch is incredibly versatile and ingeniously smart with its GPS tracking, sport tuned profiles, exercise physiological metrics, and Bluetooth smartphone syncing. The 1. 2 inch sunlight readable Garmin Chroma Display promotes easy reading in bright outdoor conditions, with a high strength sapphire lens that withstands regular use and abuse. Helpful upgrades make the Fenix 3 HR Training Watch a great candidate for high level endurance athletes training for upcoming events and outdoor enthusiasts maximizing every available opportunity for exploration and physical fitness. Improving its signal reception, the omni directional EXO antenna tracks both GPS and GLONASS satellites for quickly locking onto your precise location. The altimeter, barometer, and 3 axis electronic compass help you navigate through remote stretches of forest without getting lost. GPS track logging creates a bread crumb trail as you move across desolate stretches of wilderness, allowing you to navigate back to your starting point with the TracBack feature. The Elevate wrist heart rate technology measures your heart rate without the use of bulky chest strap monitors. Physiological metrics crunch your resting heart rate variability to estimate exercise stress level, VO2 max, and lactate threshold. These metrics help you maximize every workout session when you're training for an upcoming race or event. Advanced running dynamics measure vertical oscillation of your running movements, ground contact time, cadence, and stride length for monitoring your running symmetry. Custom apps and watch faces customize the watch's interface through the use of Garmin's Connect IQ store. It communicates wirelessly with your smartphone, giving you text messages, emails, and severe weather alerts when your phone is stashed away within your pack. Also, it uploads all of your data to Garmin's Connect online fitness community, as...