* Auto Zero, when you stop pedaling for 3 seconds or more, the Power2max resets to zero * No need for a cadence magnet* 300-400 hour battery life* +/- 2% accuracy* Data transmission to wireless cycle computer via ANT+* FSA power meters are Bluetooth and can be upgraded to transfer data via Bluetooth communication* FSA power meters can be upgraded to have left-right power measurement software* Arm forged 6061 and T6 aluminum bottom brackets* 30mm BB386EVO axle in AL 7050 alloy that works with all frames * 100% machined AL7075 chainrings* Chromo chainring bolts* Works with 10-11 speed systems from Shimano and SRAM * BCD : 110mm ABS* 751g