Bluetooth LE, ANT+ and internal: https://www.bike-components.de/en/Shimano/EW-WU111-Dura-Ace-Di2-R9150-Wireless-Unit-2017-Model-p51463/
Not bad for all that connectivity and syncro shift. Obvs will need the new battery.
Bit weird that they didn't integrate this in their new junctions (like the XT and XTR models)
@Jaap started
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Bluetooth LE, ANT+ and internal: https://www.bike-components.de/en/Shimano/EW-WU111-Dura-Ace-Di2-R9150-Wireless-Unit-2017-Model-p51463/
Not bad for all that connectivity and syncro shift. Obvs will need the new battery.