Shimano's Di2 system has undoubtedly altered the path of cycling technology innovation. By introducing electronic technology to an industry previously dominated by analog mechanical devices, Shimano made a distinct footprint. Their EW-WU101 Wireless Unit connects wirelessly via Bluetooth to Shimano's E-Tube program, allowing riders to set up and manage Di2 shifting behavior. The wireless unit's controls and data can be accessed via computer, tablet, or smartphone. Key among its assets is the ability to customize shifting preferences on the trailside using nothing more than a smart phone.
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