Shimano BT-DN110 Di2 Battery

– Di2 internal battery, fits all e-Tube Di2 groups
– Capacity: 500 mAH (± 2000km)
– Use with EW-WU101 or SC-MT800 interfaces/junction to gain BlueTooth Smart wireless connectivity for on-the-fly adjustments with smartphones and tablets
– Requires SM-BCR2 charger