Shimano EW-WU111 Di2 Wireless Unit

- EW-WU111 D-Fly wireless transmitter
- Shifting customization, system diagnosis and firmware updates can now be done through Bluetooth Smart on smart phones and tablets, using the eTube app
- Also allows to send shifting and system data to compatible cycle computers via private ANT+ protocol
- Requires BT-DN110 internal battery or BM-DN100 external battery mount