All New Shimano 105 di2 12 Speed.

SHIMANO 105 DI2 R7100 Disc Groupset 165 mm, 50x34T, 11-36
This group set contains:

ICNM7100126Q - SHIMANO Chain CN-M7100 HG 12-speed E-BIKE RATED 126 links QUICK-LINK
IRDR7150A - SHIMANO 105 Rear Derailleur (Di2 spec.) RD-R7150 12-speed Direct mount compatible
IR7170DLF6SC100A - SHIMANO 105 Brake (Kit) BRR7170KTSTR7170 Left / front Resin with fin Front bracket assembled for 160 mm rotor 1000 (black)
IR7170DRRDSC170A - SHIMANO 105 Brake (Kit) BRR7170KTSTR7170 Right / rear Resin with fin Without adapter, for rear mount thickness 25 mm 1700 (black)
IFCR7100DX04 - SHIMANO 105 Crankset FC-R7100 12-speed 165mｍ 50-34T Black
IBTDN3001 - SHIMANO Battery (Di2 spec.) BT-DN300 Internal 3.7 Wh
ICSR710012134 - SHIMANO 105 Cassette Sprocket CS-R7100-12 12-speed 
IEWEC300A - SHIMANO Charging Cable EW-EC300
IFDR7150F - SHIMANO 105 Front Derailleur (Di2 spec.) FD-R7150 Double Down swing Brazed-on Series Color

Disc size- 160/160mm

Chainrings 50/34T

11-36t

Crank Length - 165mm