2-speed, DUB, power meter, without bottom bracket, black 12-speed compatible, carbon crank arms, aluminum chainring set for screw mounting, chainline 45 mm, Bluetooth and ANT+ wireless technology, LED indicator for operational readiness, reset and low battery, accuracy: +/- 1.5%, bilateral measurement, tool-free battery change (CR2032) Number of Chainrings 2 Main Color Black Large Chainring 46 T. Small Chainring 33 T. Chainline 45.0 mm Crank Length 160.00 mm System Compatibility 12-speed Bottom Bracket DUB Variation Set