
As mentioned in other reviews, no instructions are included. Also, I didn't find any YouTube video showing how to install it as mentioned in some other videos. That's why I only gave it 4 stars and not 5. However, it's pretty easy to install. I used lens cleaning wipes to remove the old glue from the back of the watch before attaching the ring band. Haven't tried it since I installed it today. The ECG function worked. However, the ECG function no longer works. It looks like the back cover window is fogged up a bit which could be an issue. I would have to remove the cover to clean it again, but then I would need a new ring strap to put it back on. It would be great if the band was separate from the sole.

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