The Dura Ace R9100-P power meter is one of the best power meters out there. It offers reliable training data in a fully integrated package, and precision is amongst the best in its class. With dual-side power, a weatherproof battery and 300 hours between charges, it's a seriously good product.
Main features:
- Reliable electronics
- Strain gages developed by Shimano
- Automatic compensation from software
- Easy and fast start-up
- Weatherproof in all conditions
- Bluetooth LE and ANT connectivity
- Wireless update of micro-software
- Rechargeable battery integrated
- Chainrings easily interchangeable without affecting power calibration
- Compatible with direct mount Shimano brakes
- Active temperature compensation
- Battery: rechargeable lithium-ion with 300 hours autonomy
- Easy maintenance
- Great precision
