Question about Polar 720 power output

Do yourself a very big favor....have your bike shop mechanic install the power output accessory and calibrate it. This is a tedious and extremely difficult task for skilled bike mechanics, no less the un-initiated. You saved a few bucks buying mailorder--though most dealers are willing to honor prices on this sort of stuff as there are service dollars involved. Save yourself time and aggravation and spend the time having an enjoyable ride with that time. You will thank me for this advise! This product goes beyond a mere function-rich heart-rate monitor. Good luck!

Dan

Quoted post said:

Originally posted by MalachiConstant
I ordered one of these, but I haven't received it yet. I was browsing through some online information, but I am a little confused on how it works.

It appears to replace the normal speed sensor and cadence sensor that is used with the 720. However, it also appears to be wired, unlike the regular wireless stuff used on the 720. Since it is wired, how does it hook up to the 720?

Thanks