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Polar H10 Heart Rate Sensor and Soft Strap: Set the standard for heart rate measurement with the H10 from Polar. Building upon Polar's legacy of heart rate technology; the H10 is set to be the standard for the most consistent and accurate heart rate through the utilization of advanced materials and optimized construction. Combining the latest in Bluetooth Smart technology with updated algorithms; this smart strap will provide the precision serious athletes deserve. This unit is versatile - use it with your Polar unit; your favorite smart device or exercise equipment found at your local health club to get the most out of your training. However you pair it; utilize the Smart Coaching feature which delivers motivating feedback; calculates your smart calories based on personal height; weight; age and max HR; measures your aerobic fitness and last - but not least - helps you determine whether your sweat session was a fat burning exercise or an overall improvement of your general fitness. Make every beat count with the H10 Heart Rate Sensor from Polar.