DURA-ACE Dual-Sided Power Meter HOLLOWTECH II Crankset 2x12-speed A vital tool for serious cyclists, the DURA-ACE FC-R9200-P power meter delivers reliable, waterproof, dual-sided power measurement. With a rechargeable battery and BluetoothLE and ANT connectivity, the FC-R9200-P is a user-friendly training partner. The DURA-ACE FC-R9200-P power meter brings everything a data-driven cyclist could want. Its integrated, waterproof design brings all-weather reliability while delivering accurate information including left right balance. A rechargeable Li-ion battery is user-friendly and BluetoothLE and ANT connectivity ensure easy setup. Integrated, waterproof, and rechargeable Li-ion battery Up to 300 hours of ride time Depending on ANT BluetoothLE settings Accurate data collection 1.5 strain gage accuracy throughout the entire calibration range Depending on ANT BluetoothLE settings Proprietary strain gauge Possible to start quickly Simple zero offset calibration with switch on transmitter Active temperature compensation Software automatically compensates for temperature changes The provision of new force vector data makes it the optimal training tool to analyze and improve pedal stroke efficiency With SHIMANO CONNECT Lab, you can analyze and visualize your training and power data Product Specification Average weight 774 g 54-40T , 752 g 52-36T , 745 g 50-34T Chainring combination 54-40T, 52-36T, 50-34T Battery Charging cable EW-EC300 Battery Life 300 h or longer