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Feature

More AccurateOptical sensor technology for highly accurate monitoring and measurement.Train smart,get fit.allowing you to maximize your workouts.Suitable for cycling, running, fitting, etc
Work With APPsWorks with health and fitness apps: Strava,Keep,Nike+ Running,Runstatic,Endomondo,Decathlon Coach and more
Bluetooth and ANT+ Works with all Bluetooth and ANT+ enabled devices and equipment: watches, fitness equipment,cycling computer, smartphones,and tablets
20 Hours Battery LifeRechargeable battery allows you to workout for up to 20 continuous hours(charging cable included)
Heart Rate Zone Visible3 different colour in the device to show which heart rate zone you are in with a quick glance