The ProForm PFHRM309 TX 300 Heart Rate Monitor is a handy accessory for sports enthusiasts those who enjoy working out. It not only monitors your heart rate, but can also be used as a calorie counter or stopwatch. This heart rate and calorie counter watch has Quick-Touch technology that reads your heart rate accurately. The LCD clock displays the time and other details clearly. The ProForm heart rate monitor comes with a chest strap so you can monitor your heart rate continuously during workout sessions. This waterproof-watch can also be used as exercise timer. It comes with a five-year manufacturer's warranty.