The first Topeak heart rate monitor I received had to be returned after only a week and a half of use. The second block worked flawlessly and repeatedly. I use it every day for commuting, weekend workouts, and sometimes to monitor my resting heart rate. I've even used it to track my sleep amount. The strap is comfortable and doesn't absorb odors - washing hands after a workout is a must. I hardly notice that he is in place during training. EDIT: Outside the right of return time, the second block also failed. For this reason I am deducting three stars from this rating. I state that when it worked, it connected flawlessly and without any problems. After a recent problem I replaced the battery, "forgot" the device and tried to reconnect to no avail. In general, I like Topeak products, but this one didn't convince me.
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