Shimano, EW-WU111 Di2 Wireless Unit, Inline wireless unit, IEWWU111B

Description

* 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