The 4iiii Precision Gen 3+ Power Meter Ultegra R8100 172.5mm Left Crank Arm is a compact and lightweight power meter designed for both professional cyclists and enthusiasts. It offers exceptional accuracy with its 3D strain gauge technology, ensuring precise power measurement. With up to 800 hours of battery life and an automatic terrain selector, it provides reliable performance across various terrains. The integration with Apple Find My adds convenience by allowing users to track the device’s location. Backed by a 3-year warranty and an IPX7 waterproof rating, this power meter is built to withstand challenging conditions, making it a dependable training partner.