Rotor-Q InPower 3D+

The 2017 Rotor InPower 3D+ is a high-end power meter. The meter itself is ensconced within the bottom bracket, invisible to the eye, maintaining the clean lines of the Rotor crankset. Operating on a disposable battery, the meter sips power, lasting as much as 300 hours of riding time without a change. Power, cadence, and the left side's torque effectiveness and stroke smoothness are reported accurately via ANT+ to computer or smart phone. Rotor recommends TrainingPeaks' software, and provides an introductory plan of their own for new users.
A good power meter.