This is my favorite powermeter fue to it's durability and accuracy, but unfortunately it doesn't fit my new bike. White decal can be replaced with another color to match your paint scheme.

Here's SRM's description.

Each SRM PowerMeter is made one at a time, by hand. Our production facilities are located in Julich, Germany and Colorado Springs USA. Every step of production is carried out by highly trained engineers and technicians who have a passion for quality craftsmanship.

Add on the industry's leading accuracy and data reception rate for a truly unrivaled power measurement device.

SRM uses a 144 point calibration protocol against a known mass measured to the exact gram. With exacting calibration and our auto-offset feature, the resulting power measurement of the SRM has error of less than 1%. The scientific community has been publishing peer reviewed research for over 20 years using the SRM PowerMeter as the bench mark for measuring power in physiological and human performance research studies. We don't claim anything, our accuracy is proven.

SRM's are designed to take whatever you can throw at them. From freezing temperatures, to boiling heat, SRM's are designed to handle temperature compensation while maintaining accuracy with our "Auto" offset feature. Each SRM is designed to be sealed against water, snow, mud, sand, and cleaning solvents. SRM's are designed to work. Period.

http://www.srm.de/products/srm-powermeter/s-works-road/