Shimano EW-WU111, Di2 Wireless Unit with 2 E-Tube Ports

• 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