They are sold by Geekbuying for $24, Gearbest for $28 and Tinydeal for $28.40. I don't have experience of buying from any of them. Can someone please recommend me a trustworthy seller?
Also, people who are already using the non-heartrate monitor version, does the band provide data for cycling and swimming? And are the data provided reasonably accurate? Thanks.
Can't comment on that particular product, but my fitbit has the same sensor. It works fine. Apparently it isn't as accurate as a chest strap (for workouts), or a hospital one (obviously).
I think it helps that i'm not a hairy bear man too. and AFAIK they dont work if you have tattoos.
As for all 3 of those websites, i've ordered from all of them. It's going to take a long time to arrive, like a month