With a rich history in developing sports technology, 4iiii innovations has worked hand-in-hand with the world's best cyclists to develop an industry-leading powermeter. Using patented 3D strain gauge technology, the 4iiii crank delivers accurate, reliable and consistent data. Trusted by the best athletes in the world, the same technology is now available to indoor riders. Whether it’s tracking calories or in-depth power analysis, the 4iiii crank offers accurate results to help riders reach their full potential.Features Most accurate direct crank based power measurement with 1.5% accuracy Bluetooth Smart and ANT+ provides reliable connection to leaderboards, personal tracking apps, sport watches and consoles Reliable, robust and watertight The sam-ams: Quick-Step Floors, BORA-hansgrohe and the Canadian National Cycling team 2000+ hours of battery life via 2 standard AA batteries With a rich history in developing sports technology, 4iiii innovations has worked hand-in-hand with the world