It works better than most trackers on the market.

I've had no issues with this tracker at all. It's waterproof and lasts about a week without charge. I also love that I do not have to own a special cord like the fitbit and can use any usb insert. As for accuracy, there are times it is a bit late to pick up my heartrate when working out but none of these trackers are perfect. I just it to get an estimate of the miles I run.

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