$100 to $200

2 A charger with decorative packaging Power cable and instruction manual included

External Di2 Battery Mount BM-DN100 External battery mount SM-BTR1 Required to establish a wireless connection between the Di2 system and the e-Tube app Backward compatibility: allows you to use all Di2 wireless features on older Di2 groups at a lower cost

For charging internal SHIMANO DI2 batteries (BT-DN110), the SM-BCR2 also serves as a PC interface device for E-TUBE PROJECT firmware updates and adjustments.