Lightweight powermeter spider for Sram`s 8 bolt direct mount interface and Thread Mount chainringsThread Mount design is light, stiff and accurateUser replaceable CR2032 battery with 200-hour battery lifeBluetooth low energy technology and ANT+ wireless data transferMagicZero automatically checks and recalibrates your power meter as you rideAXS enabled for easy monitoring and firmware updates10K Temperature CompensationNo cadence magnet required8-Bolt Direct MountThread MountBlackUPC/EAN/GTIN: 710845920110