I made a comment in the other thread, but I searched through the entire website and couldn't find how it connects to the iPhone and what the range is on the con

I made a comment in the other thread, but I searched through the entire website and couldn't find how it connects to the iPhone and what the range is on the connection. A lot of people are talking about using it for workout stuff, but if you also have to carry your iPhone around with you, isn't that a non-starter?