Why pay over $100 for a heart rate monitor when the D-71 Heart Rate Monitor for Dummies offers the same functions for a fraction of the price? Similar to a standard wristwatch, the strapless D-71 lets you safely and effectively monitor your heart rate and workout intensity with just a quick glance at your wrist--no chest belt required. Monitoring your heart rate is important whether you're training for a marathon or just want to walk for basic exercise and weight loss. Not only can you determine whether you're exercising too vigorously or lethargically, but you can also create a custom workout routine with escalating intensities. Best of all, the D-71 is simple and easy to use, with a Dummies formula instruction guide that walks you through the necessary steps. Other details include an extra-large LCD display for easy viewing, 12- and 24-hour settings, a stopwatch, a daily alarm, a countdown timer, and a calendar. Weighing only 4 ounces, the D-71 is backed by a one-year warranty.