QUARQ crankset powermeter "DFour"

High performance with low energy consumptionSet yourself new goals, focus on accuracy and reliability and bring out your best performance. With the QUARQ "DFour" crank sets plus Crank Set Powermeter, you have a reliable companion that shows you your performance after every training session and every race. For accuracy, it measures your pedaling power on both carbon crank arms (+/-1.5%).The crank was specially developed for the SHIMANO 11-speed "Dura Ace 9100" and "Ultegra R8000" chainrings and is waterproof to IPX7. Thanks to the innovative "MagicZero" feature, the crankset is automatically calibrated while riding without you having to step back or calibrate manually via the head unit.With Bluetooth and wireless ANT+ data transmission, your tour data is transmitted directly to the Bike Computer. And yet the power consumption of the Powermeter is comparatively very low - you can enjoy up to 200 hours of riding on one battery charge. It can be changed for the next tour without tools.