I got this for my spouse after he saw someone else wearing one and wanted one for himself. The only thing we had to do was measure his finger and order the correct size. Once it got here, he had to download an app to his smartphone and pair his ring to it. He had a problem doing that in the beginning, but he finally figured it out and now it works. He used to have one of those fitness trackers that you wear on your wrist, but he likes the ring much better. This thing reports a ton of information, like steps walked and calories burned, heart rate, blood oxygen, sleep time and quality, and stress level. It comes with a USB cord to charge it, and will give you a visual cue when the battery is starting to run low. He wore it fully charged for two days, and is now getting an alert that it needs to be charged.
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