The TIMEX requires no calibration. You turn it on and wait about a minute and
the thing beeps and you are ready. Nothing to mess with. It will continually
readout the time/distance/speed/pace (both instantaneous and average). Press
the split button on the chrono and it records all of these into the split memory.
I run in a heavily wooded area for my long runs. The TIMEX didn't do too
badly. It did report "weak signal" for a few seconds a couple of places in
the run, but it seemed OK. Other runners in the area have reported similar
results. I'm happy with it (although I think there's a lot of room for improvement
in it, including the addition of a heart rate monitor, and a way to down load the
data and perhaps a continuous logging feature like the Fitsense).
The TIMEX comes in two flavors. The 50 lapper (lists at $200, but can be had on
the net for about $140) and teh 100 lapper (lists at $225 but can be had for $200).
In addition to the additional laps the 100 also has an alert that beeps when you
get off the pace (I believe, I don't know I've only got the 50, the Fitsense has a
Frankly, since I use the thing more for just distance measurement (since I run on
unmarked courses a lot) than for the other "coaching" features, the TIMEX works
better for me.
You may want to have a look at the Fitsense, which uses the same
technology as the Triax, but has more features like HR, computer IR
link, etc. On the other hand, the Triax is more elegant and