4iiii Precision 3+ Shimano Ultegra R8100 Left Side Power Meter

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Whether you’re a pro or simply training hard, PRECISION left side power meters deliver industry-leading accuracy, highly dependable cadence data, 3D power meter technology capable of measuring tri-axial strain on your crank arm. Packaged into a durable, lightweight design and compatible with broad ANT+ and Bluetooth head units, PRECISION helps you train harder and smarter. Features 3D power meter technology (patent pending) measures tri-axial strain on your crank arm Accurate, consistent data Lightweight, compact design Battery status indicator via 4iiii app Compatible with ANT+, Bluetooth Smart head units, smartphones, and other 4iiii products User-friendly app and configurable rider compensation scale factor Easy setup and maintenance Specifications Weight: 9 grams Data accuracy: +/- 1% error margin Battery life: 100+ riding hours on 2032 coin cell battery Show more