MONITOR YOUR HEART CONTINUOUSLY: The Frontier X2 Smart Heart Health fitness monitor is designed to record your heart rate for up to 24-hours during exercise REAL-TIME VIBRATION ALERTS: Train in the right zone with confidence and without distractions by setting real-time, personalized, single and double buzz vibration alerts. These alerts will tell you when you've reached a desired or threshold heart rate while exercising or while at rest. MEASURE WHAT MATTERS: Measure changes in Rate, and Strain to better understand your heart. LIVE-STREAM AND SHARE YOUR HEART RATE: Remotely live-stream your heart rate, instantly and securely, to any web browser or mobile device across the world. Share your information with friends and family or medical providers if you choose. The data is yours to use VERSATILITY: Wear your Frontier X2 Heart Monitor when running, Cycling, rowing, swimming, going to the gym, and training both indoors and outdoors. The Frontier X2 is fully waterproof up to 1.5 meters, and three times faster than the original Frontier X. SUPREME ACCURACY: Widely recognized for its top precision by many sources, Frontier X2 is the Most Accurate Heart Monitor in Frontier’s history. Frontier X2 provides top quality heart monitoring and it's the choice of many pro athletes. SMARTPHONE APPS AND WEB DASHBOARD: More than just counting heart health — Lifetime Free Access to key Frontier X health metrics like heart rate, Strain, Activity Load, Training Load, Body Shock, Health Tracking and more. Record, track and analyse your heart health right on your smartphone with the Fourth Frontier app EASY TO USE CHEST STRAP: With improved electrodes, an easy-to-use buckle and silicone dots, the strap is comfortable and interference-free, and stays put when you're on the move.