This Certified Refurbished product is tested and certified to look and work like new. The refurbishing process includes functionality testing, basic cleaning, inspection, and repackaging. The product ships with all relevant accessories, a minimum 90-day warranty, and may arrive in a generic box. Only select sellers who maintain a high performance bar may offer Certified Refurbished products on Amazon.com
2ND GENERATION RUNNING DYNAMICS -Calculates 6 advanced running dynamics: stride length, ground contact time balance, vertical ratio, cadence, vertical oscillation and ground contact time
PHYSIOLOGICAL MEASUREMENTS -Supports advanced physiological measurements: stress score, performance condition, lactate threshold, recovery time, VO2 max, predicted race times
BATTERY LIFE - Long-lasting, user-replaceable battery.
WIRELESS - Wirelessly transmits accurate heart rate to your compatible device