SUUNTO SMART HEART RATE BELT 2

An ECG front end identifies and rejects the artifacts that distort a heart rate reading, so the trace follows your effort through intervals, surges and long steady work. A new chest-strap construction shields the signal from static noise, holding readings stable from the first minute. High-resolution beat-to-beat R-R data is also what makes real-time ZoneSense possible on a compatible Suunto watch.