Use CouponSmarter' s discount to save when shopping for Unlike typical heart rate monitors that require uncomfortable chest straps, this heart rate device is as unobtrusive as a standard wrist watch and provides an EKG accurate reading to 1 beat-per-minute at a touch of a button. A signal beeps twice when your heart rate exceeds or falls below your optimal beats-per-minute target zone, informing you when to increase or decrease workout rate. Chronograph and countdown timer features allow you to ...  ...More Details