Shimano SM-BCR2 Internal Di2 Battery Charger Update Firmware Dura Ace/UltegraGRX

All Di2 components on the bicycle require the same firmware version Using Di2 components with different firmware versions may cause malfunctions For use with Alfine Di2, Dura-Ace 9070, R9100 and Ultegra 6870/6770 equipped bicycles SM-BCR2 Internal battery charger is specific to the SM-BTR2 and IBTDN1101 internal battery (BA9075) Includes USB (SM-USB1) power adaptor