Product details:

4iiii Precision 105 R7000 Powermeter 170mm Black Power Meter Cranksets. Making the most of its ability to measure tri-axial strain, this innovative crank arm gives precise readings to within +/-1% to keep you committed to shaving off the seconds. Bluetooth and ANT+ compatible, it will relay your riding data to your compatible mobile device or onboard computer, allowing you to analyze and adapt your ride at any given time. With over 100 hours of usage from the included battery, this easy-to-install crank will keep you riding as efficiently and effectively as possible, ride-after-ride.