This HRM was purchased for use with the Vivoactive 3 and the instructions that came with the monitor on how to connect it were vague (although both devices are made by Garmin. I struggled to find online until My brother-in-law told me to read the manual that came with my Vivactive 3. Sure enough, there were three easy steps to pairing them. I think every device is different, so looking back it makes sense. You never have to if now that I start exercising (usually running), it automatically connects the HRM to the wrist for a more accurate heart rate reading than a watch. The strap is surprisingly comfortable to wear. But this one works great. The front third is a flexible soft rubber, that goes under the rib cage and the rest is a regular elastic band that you want to wrap around I don't know about the H durability, but from the reviews I've read, this one should last a bit longer than the full stretch version. No complaints so far and in the first three weeks of use I had no problems.
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