Connectivity: 1x EW-SD50 E-Tube port. These seem to go for between £50 and 90 in used condition so I am splitting the difference! Capacity: 46T to 53T top gear teeth (maximum 16T capacity). Chainline: 43.5 mm.
Shimano Ultegra Di2 Front Derailleur FD-6770
Shimano Ultegra Di2 R8150 12 Speed Front Derailleur Mech Braze-On
New Shimano Ultegra Di2 R8150/R8170 Road Groupset 2x12 24 Speed 50-34T/52-36T
Shimano Ultegra Di2 ST-R8070 Bracket Covers Rubber Lever Hood Y0E698010 - Black
Shimano Ultegra Di2 R8150/R8170 2x12 Speed Groupset ST+BR-R8170+FD+RD-R8150 4PCS
New Shimano Ultegra Di2 R8150/R8170 Road Groupset 2x12 24 Speed W/O Crankset&BB