Precision piece of engineering and for the price it's just astonishing what it does. I tried an earlier one two or three years ago and it lasted about 20 minutes. I'm glad I took another chance. Loads of fun for all.
I turned to this strap because my Garmin watch has never talked properly to the HRM on the Garmin strap! This is the second Polar strap I've bought and it's excellent again, and way less than half the price of what Garmin is asking.
Followed the simple instructions in the book, and it just worked and continues to work. Who could ask for more? No more complaints from visitors, wifi devices connect and start downloading email as I'm parking outside my house!