Meet the LifeTrak Zone R420: a health tracking device that lets you monitor your heart rate and sleep. It counts your steps and calculates distance traveled. The device lets you monitor your heart rate continuously via a chest strap and Bluetooth.
Thanks to this watch, you can avoid overtraining. You can access and analyze your data via the LifeTrak app. The Zone R420 is water resistant to 30 meters. The battery lasts 1 year (coin cell). More information is available here.