Whether you're getting in shape for your first 5K, or working toward PR time at your next triathalon, optimize your workouts with the New Balance NX710 CardioTRNr. The watch works together with a Bluetooth heart rate sensor chest strap and a fitness app to help you train efficiently and effectively. The ECG accurate Bluetooth chest sensor is able to transmit heart rate data to the watch, your smartphone, and compatible gym equipment. Customize heart rate zones on both the watch and fitness app, and set zone alerts on the watch. Also track your speed, pace, averages, distance, total steps, calories burned, total workout time, and time up to 100 laps or splits. The watch automatically calibrates to your stride length, and can recall up to ten training sessions so you are able to assess your progress. The watch displays the time, day, date, and two time zones at once, and you can set an alarm to go off daily and a chime to sound hourly. Since the watch is water resistant, you are also able to wear it in the pool to time laps and your overall swim workout. Whatever your fitness goals are, use the NX710 Cardio TRNr to help you achieve them.