Power tap Pro.
Looks a bit like an SL, but its not.
The Saris guys are amazing. They certainly stand by their product. Awesome to know this when you live thousands of miles away from their HQ. These babies look totally different inside to the old yellow model pro. It has little hearing aid type batteries instead of the bigger half AA sized ones.
The weight is very similar to the old yellow pro though, despite the shiney carbon : ) - well, it was on my kitchen scale.