Customer Rating:      Summary: XXL ???? Comment: The big advantage of a Polar transmitter is that, with or without the wrist receiver, it communicates with a lot of exercise equipment that is fitted with Polar telemetry - when you wear the strap, you don't need to hold the sensor grips for a heart rate reading. I got my transmitter to take the place of my S210 monitor and strap which are off on warranty repair (another story). I took it down to the local Gold's Gym this morning, and it seemed to work just fine on the Life Cycle. I am perfectly satisfied with it, but I caution others: The WearLink 31 apparently comes in two sizes: "XS - S" and "M-XXL". My lower chest, where the strap fits, measures 36" - I'm not exactly a big man - and yet I had to extend the strap of my "M-XXL" a full 80%. A truly "extra large" man would be out of luck. Be careful!
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