4iiii Fouri 【Twist Cap】4i PRECISION3+ Power Meter Ride Ready Left Crank Only DURA-ACE R9200 Shimano Bicycle Crank Arm Left crank with power meter Battery-operated The most powerful PECISION 3+ power meter to date is smaller and lighter, and supports Apple Find My. With up to 800 hours of battery life, automatic terrain selector, +/-1% accuracy, and industry-leading 3-year warranty, the PECISION 3+ power meter will be an accurate and reliable tool to unlock your potential. *If not using FindMy (Android users), battery life is up to 800 hours. Enabling FindMy allows for 400 hours of ride time and 6 months of FindMy capability. LED light indicating status Please note that product design, specifications, and appearance may change without notice. Cycle parts drivetrain bicycle crank arm bicycle road bike MTB mountain bike cyclocross cross bike