Jmann
Never gonna let you down.
My wife got me this for our anniversary, but I'm way too casual a cyclist these days to need something like this. Uses a sensor in a sleeve to tell you your blood lactate and oxygen levels. Can be used to test your threshold, freshness, gauge your warm up, and efficiency. If you've thought about trying one of these, this is an opportunity to do so at a discount. Contains everything that came in the original package and a large and small sleeve. $250
