Compatible with Shimano Hollowtech II road drivetrains. Measures power with an impressive +/-1.5% accuracy.Active Temperature Compensation accommodates changing temperatures. Upgraded BLE and ANT+ radios offer a 6X improvement of data transmission strength. Pairs with Stages Power App for firmware updates and zero resets. Pairs with head units like the Garmin Edge for zero resets. 200+ hour battery life with easily-changeable CR2032 coin-cell battery. Only adds 15g to base crank arm. Device Compatibility: ANT+, Bluetooth Smart Ready. Software Compatibility: Zwift, TrainerRoad, The Sufferfest, PerfPRO Studio, and others. The item "Stages Gen 3 Power Meter Shimano 105 5800 Black 172.5mm Brand New in Box" is in sale since Thursday, December 10, 2020. This item is in the category "Sporting Goods\Cycling\Bicycle Electronics\Power Meters". The seller is "kblank19" and is located in Novi, Michigan. This item can be shipped to United States.