No Compromise Power Meter When you want the best its only natural to gravitate towards the Shimano brand. This Shimano DURA-ACE FC-R9200-P dual-sided power meter has a reliable, integrated design. Being waterproof it brings all-weather reliability and is reliable for delivering precise information including left/right balance, cadence and much more. Hollowtech II Technology Designed around the well-respected Hollowtech II technology with uniquely developed chainrings featuring Hollowglide construction, this power meter crankset ensures fast precise shifting whilst still maintaining the strength which results in better power transfer. This component is finished off with a rechargeable Li-ion battery, Bluetooth LE and ANT+ connectivity, allowing this crankset to collect real-time precise and reliable power output data so you can track and analyse every detail of your ride to fine tune your training and racing program when you get home.