SHIMANO SW-R671 SWITCH SET Di2

Shimano's Di2 Bar-End Shifters are the ticket for time trial/triathlon bicycles running Shimano's Di2 electric-shifting components (sold separately). With a simple, light touch of the easily accessed buttons, you get instant, perfect gear changes every time. 

Specifications

Brand: Shimano
Manufacturer Part Number: ISWR671P
UPC: 689228728332
Unit of Sale: Shifters Only
Shifter Type: Bar End
Shifter Speed: 2x11 Speed
Shifter Actuation: Electronic
Position: Pair
Colour: Black
Weight (pair): 95g

All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions.
Use Di2 system checker to update component firmware from http://e-tubeproject.shimano.com/
SW-R671 2-button TT/Tri shifter set have 600mm length built-in E-tube wires, controls front and rear derailleurs.
Not compatible with Dura-Ace 7970 Di2 systems.