Stages Cycling Power Meter G3 LR (Dura-Ace R9100)Ridden by three TDF winners and multiple championship winners to victory, Stages power metres have been proven to be able to perform at the most elite level of the sport. This dual-sided power meter provides readings with an accuracy of within +/- 1.5% and can be used with any Shimano road drivetrain.Increased AccuracyStages has built on what it learned when producing its Gen 2 model, by developing the technology even further for increased accuracy of the readings. This model is assembled within Shimano's top-of-the-line Dura-Ace R9100 crankset and measures the individual power output of each leg. Also, each Stages power meter gets individually calibrated to ensure an accuracy that can be trusted by avid amateurs and professionals on the World Tour.Reliable Readings In Any WeatherTo ensure the measurements remain consistent in any weather type, Stages introduced a feature that's never been seen integrated into a power meter before. The feature is “Active Temperature Compensation” and Stages added this technology to account for any sudden temperature changes that you might encounter on your ride. If temperature changes are not accounted for, it can result in false and inaccurate data.Strong ConnectionOther improvements include more powerful Bluetooth and ANT+ transmitters. These improvements ensure the power meter provides a powerful and stable connection with your cycle computer is maintained. Also, thanks to the addition of a more advanced accelerometer, the power meter has a faster sampling rate for more up-to-date feedback on your performance.Features:Accelerometer based cadence measurement  Wirelessly upgradable firmware  LED indicator displays battery level  Updated accelerometer and addition of gyroscope  Upgraded BLE and ANT+ radios offer a 6X improvement of data transmission strength  Battery Life: 200+ hours (coin cell: CR2032) when used as a single sided meter  Power Range (Watts): 0 to 5000  Cadence range (rpm): 10-220  Water Resistance Rating: IPX7Weight: Only adds 20g to base crank armCompatibility:  Compatible with all Shimano Hollowtech II road drivetrains  Frame Compatibility: Most frames  Device Compatibility: ANT+, Bluetooth Smart ready   Software Compatibility: StagesLink, Training Peaks, Strava, Garmin Training Centre and othersIn The Box:  Power meter  High-quality CR2032 coin cell battery  Product identification card with serial number and ANT+ I.D.  Number user guideBuy Stages Cycling Components from Chain Reaction Cycles, the World's Largest Online Bike Store.