4iiii Precision 3 Left-Side Power Meter (For Shimano) (165mm) (Dura-Ace R9200)

4iiii Precision 3 Left-Side Power Meter Description: When you’re working hard to push your fitness to the next level, you want a power meter that’s reliable and accurate. The 4iiii Precision 3 power meter is designed for the long haul with up to 800 hours of battery life, riders will change batteries every year, rather than every season. For the data crunchers, the Precision 3 uses three strain gauges to measure changes in your pedal stroke output a rare feature for left-side-only power meters. Guaranteeing accuracy, the Precision 3 has been third-party tested to verify a plus or minus 1% margin of error in the readings. Rest easy knowing your cycling investment is monitored using compatibility with the Apple Find My app for location and recovery. Available on a number of Shimano Hollowtech II crankarms (all Hollowtech II crankarms are interchangeable, however, you may want to choose a matching crankarm for aesthetic reasons). The Precision 3 power meter adds only 9g to the weight of these stock Shimano cranks. Note: Some bikes don’t have enough clearance between the crankarm and frame for the Precision 3 power meter (especially gravel bikes with wide chainstays). Use 4iiii’s clearance checker to verify fit. Features: Ride-ready left-side power meter Built in support for the Apple Find My app enables location and recovery using iPhone, Mac, and Apple Watch Up to 800 hours of battery life for years of riding 3D Strain Gauge technology reveals power output changes over the full pedal stroke /-1% accuracy (3rd-party verified) Compatible with ANT PWR and Bluetooth standards for compatibility with nearly all head units and smartphones Low profile design for better frame compatibility IPX7 waterproof for reliability in the the toughest conditions Indicator light tells you when power meter is on, if you successfully calibrated it, or if the battery is low Pre-installed on a brand-new Shimano Hollowtech II crankarm All Hollowtech II crankarms are interchangeable, though colors and design vary by model Specifications: Accuracy: /-1% Battery Type: CR2032 Coin Cell Battery Life: Up To 800 Hours Waterproof Rating: IPX7 Cadence Range: 30 – 170 RPM Power Range: 0 – 4000 W Operating Temperature: 0 to 50C (32 to 122F) Communication Protocols: ANT , Bluetooth Height: 5.5mm (Power Meter Beyond Crankarm) Weight: 9g (Power Meter Only)