Polar RS300x SD Heart Rate Monitor Watch and heart rate monitor in one designed to help serious fitness enthusiasts study and optimize their aerobic training Smart Coaching features help you train at proper intensity for desired results; Polar Fitness Test designed to remove guesswork from training OwnCal calculates number of calories expended during a training session based on weight, height, age, gender, and maximum heart rate Comes with Polar RS300X training computer, WearLink+ transmitter, S1 footpod, RS300X Getting Started Guide, and S1 foot pod user manual Includes limited two-year manufacturer's warranty