







The Fourth Frontier X2 is a chest-strap wearable that combines continuous ECG-based heart monitoring with performance tracking. Designed for all-day comfort, it captures detailed cardiovascular data during training and rest. Wear it to track heart rate, HRV, stress, and recovery for smarter training decisions.
Smartech Fourth Frontier X2 The Frontier X2 is a chest-strap wearable combining continuous ECG-based heart monitoring with highly accurate performance tracking. Designed for comfort and precision, it delivers deeper insights into stress, recovery, heart rate variability, and physiological load.
The Frontier X2 is a chest-strap wearable that combines continuous ECG-based heart monitoring with highly accurate performance tracking. Designed for those who want deeper insight into both fitness and heart health, it captures richer cardiovascular and physiological data throughout the day.
Built for comfort and long-term wearability, the Frontier X2 helps you understand how your body responds to training, stress, and recovery. As a chest-based monitor, it offers accuracy widely regarded as the gold standard in heart-rate tracking, delivering more consistent readings than typical wrist-based wearables.
It tracks key indicators including heart rate, ECG, heart rate variability (HRV), stress response, recovery patterns, and physiological load, reflecting the overall strain placed on the body through daily activity.
With a clearer view of cardiovascular function and body readiness, the Frontier X2 supports smarter decisions around training intensity, recovery, and lifestyle, offering a more advanced and data-driven approach to wearable monitoring.
Key Features & Benefits