With up to 800 hours of battery life, an accuracy of +/- 1% and a weight of 9 grams, the 4iiii PRECISION 3+ Power Meter is a reliable training tool for your bike rides. The sensors are now available in a double PRECISION 3+ Pro version with Shimano 12v crankset for more precise power data than ever before

By leveraging the Apple Network, cyclists with a 4iii PRECISION 3+ and PRECISION 3+ Pro power meter can now enjoy the peace of mind that comes from knowing their bike's location