Originally Posted by ViperZ

Thanks for the response. So it would seem the S120 is aimed at Runners and the S150 is aimed for cycling.

Surprizing the S120 cost more , even on ebay.

I think I may go with the S150 if it's between the 2. It seems to be available for less and seems to have the same features, and is more aimed for my sport.


I only ask about the batteries for a club memember told me to be aware a lot of Heart Rate Monitors do not have user replaceable batteries in the chest belts and you actually have to buy a new unit once the batteries die.