. The BM-DN100 Battery Mount is ideal to be used on frames that are running Shimano Di 2 components externally. This mount is specifically designed for the new Bluetooth SM-BTR1 battery, which gives earlier versions of Di 2 the feature of being able to change your shifting preferences wirelessly
Features: Former Di 2 generations go wireless with this new mount External mount holds new wireless Bluetooth Di 2 battery E-tube technology means that you can change your shifting preferences mid-ride A 2 year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace & XTR products) Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.