The 4iiii Precision 3+ Power Meter delivers laboratory-grade accuracy for serious cyclists. This single-sided GRX RX810 crankset power meter transmits real-time wattage, cadence, and calorie metrics to your head unit, enabling data-driven training optimization. Built on proven 4iiii technology, it provides the reliability needed for structured workouts and performance analysis. Integrated Apple Find My functionality offers peace of mind when your bike is out of sight, allowing quick location tracking via iPhone, iPad, Mac, or Apple Watch. Train with confidence knowing your power data is precise and your equipment is always findable.