I don't have the exact model number handy, but do NOT buy a wireless speedometer from Bontrager. Bought one for my dad, first ride that would a couple mile test ride it claimed he went over 90 miles. Still pissed I spent $100 on something so crappy.

Other than that I don't have a recommendation. I personally find wired speedometers to be far more hassle free and reliable - I've never had a battery die and a wire doesn't have interference issues. It just always works. But, I don't track cadence.

When I want more sophisticated info I used a gps tracking app on my cell phone. As long as the cell phone screen is off it doesn't hit my battery life to badly, probably lose about 1/3rd of battery for a 2 hour ride.

I'd suggest a wireless model if I knew of a reliable one but I don't. I personally use a wired one on all my bikes for speed, distance, and having the time displayed in front of me. And my cell for gps tracking.