Shimano R7170 105 Di2 Groupset 12-Speed Complete  Including:  Shimano 105 Di2 Rear Derailleur (RD-R7150) Shimano 105 Di2 Front Derailleur (FD-R7150)  Pair Shimano 105 Di2 (ST-R7170) Hydraulic Shift/Brake Levers, right & left  Shimano 105 Hydraulic Disc Brake Calipers with Pre-bled Hoses, (BR-R7170), Flat Mount, Front & Rear  Shimano Di2 Internal Battery (BT-DN300) ...