Garmin forerunner 35 gps running watcha premium watch tailored made for the runner with gps capability and a wrist based heart rate monitor.heart rate monitoryour heart rate is one of the most effective ways of discovering your accurate fitness level as it increases and decreases. The forerunner 35 comes with a built in heart rate monitor in the wrist of the watch which takes away your need for additional chest straps or anything else so that you can track your heart rate 24 hours a day.connectivityyour forerunner 35 watch can be synced with your smartphone allowing you to get notifications from your phone right to your wrist. With the live tracking feature you can connect with friends and follow their runs in real time. The watch, when connected to your smartphone, will also search for software updates and automatically update. You can also connect your watch to the mobile garmin connect app that will let you keep track of your fitness with even more features and modes.24 7whether your racing, training, or just walking around the office the forerunner 35 will automatically track your activity. The watch keeps track of your daily activities 24 7 and monitors your steps, calories, distance, sleep and intensity minutes. You can set the watch to give you vibration alerts if youve been inactive for a certain amount of time so that you know its time to move.featuresmonitors heart rate 24 7 via the wristbuilt in gpsall day activity trackingautomatically uploads data to garmin connectbuy garmin watches chain reaction cycles, the world's largest online bike store