4iiii Shimano Ultegra Precision Power Meter (left/non-drive side) crank arm and right Shimano Ultegra 8100 crank-armPlease understand that this is a left-side only power meter, not a dual power meter. This is for the crank arms only, this is not a complete crankset.MSRP: $450+
Ultra-light left-side power meter for Shimano Ultegra FC-R8100 cranksets
Accuracy +/- 1%
Easily install straight out of the box with the standard Shimano crank installation
Offers up to 800 hours of battery life with the CR2032 coin cell battery
Compatible with all popular indoor training apps with ANT+ and Bluetooth connection
IPX7 waterproof rating, automatic terrain selector, Apple Find My feature, ANT+ and Bluetooth connectivity
Add to the Find My app to locate on apple products when not in use
Returns Accepted for this item if it's within 30 Days