4iiii Ultegra R8100 Precision 3+ Pro Dual-Sided Powermeter Prepare to elevate your cycling experience with the new PRECISION 3+ PRO Powermeter featuring integration with Apple Find My. Offering the same reliable and highly precise power metrics you've come to trust from 4iiii, while enjoying the peace of mind of knowing the location of your bicycle. Equipped with advanced measurements including left/right balance, pedal smoothness, and torque effectiveness, the PRECISION 3+ PRO Powermeter delivers the essential data for both training and competitive riding. With a battery life of up to 550 hours, an automatic terrain selector, +/-1% accuracy, and backed by our industry-leading 3-year warranty, the PRECISION 3+ PRO Powermeter will be your dependable companion for years to come. Technology Apple Find My: Offering the reassurance of knowing the whereabouts of your power meter. Battery Life: With up to 550 hours of battery life, you can be confident that you won’t need to change the battery for years to come. Accuracy in 3D: Not everyone has the perfect pedal stroke. With an accuracy of +/- 1%, 4iiii is the only crank-based power meter to utilise 3 strain gauges to measure all forces in your pedal stroke. Automatic Terrain Selector: Detects the terrain you’re riding on for more responsive cadence and power feedback/data. Ride confidently on less-travelled roads. Cycling Metrics: Receive additional data such as pedal smoothness and torque effectiveness to analyse and optimise your pedal stroke. Left Right Balance: A dual power meter measures the power from each individual leg to calculate your total power output. Lightweight: 4iiii produces the lightest power meter on the market. We are dedicated to helping you get faster, one gram at a time. Ultra Low Profile: With an ultra-low profile design, your 4iiii power meter is compatible with more bike frames than ever before. Waterproof: Designed to withstand tough environments. With an IPX7 waterproof rating, you can be assured that your power meter can handle the most challenging conditions. 3-Year Warranty: A lot can happen in 3 years. While you probably won’t need it, it’s comforting to know that all 4iiii power meters are backed by an industry-leading 3-year warranty.