Product Description
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 Plugs into SM-EW90 cockpit junction boxes or SC-S705 display unit