I also have a irregular heart beat and use an old Polar wrist model mounted on my handlebars but it needing a new battery which has to be replace by Polar.

So have been looking at upgrading to single computer unit.

I need to see my heart beats like the little heart symbol that flashes on my Polar. Looked a Cateye and it does not flash.

So Polar has a c100 that if I read the manual correctly, the outside of the symbol does show the actual heart beat.

Can anyone confirm this?

Bob