Where can I find serial number and ANT+ ID? The numbers are given: On the silver sticker on the crank arm, On the silver sticker on the power meter box, On the black business card attached inside the device package, Tagged: ant+ ids/nserial number Related Articles How to install and start the device? How to connect the POWERCRANK with my bike computer? How to perform calibration? What do the calibration values mean? How often do I need to perform calibration on my device? Is calibration in the app the same as calibration from the bike device level?