Ver. 4.2.3

■ Changes
Security performance for wireless communications between the shifter and rear derailleur has been improved.
Click here to view FAQs for more information. https://bike.shimano.com/faq/DI20A#D-7030
*The firmware for both the shifter and rear derailleur must be updated for proper operation of the Di2 system.
■ Others
General bug fixes.

Ver. 4.2.1

- The FRONT SHIFT NEXT function is now supported.
-The issue where the rear derailleur cannot be adjusted on E-bikes with a third-party drive unit has been fixed.
- The issue where the rear derailleur cannot be adjusted using E-TUBE PROJECT Cyclist has been fixed.
*If you are experiencing this issue, SM-PCE02 and E-TUBE PROJECT Professional are required to perform an update. Please contact your place of purchase.

Ver. 4.1.0

- EW-EX310 is now supported.
- Fixed identified issues.

Ver. 4.0.2

Firmware released.