Shimano Ultegra Di2 ST 6770 Dual Control Levers. Shimano broke the mold with their Dura Ace Di2 group. Effortless shifting, instant engagement, unparalleled performance. Well, now you can get electronic shifting without shelling out all that dough. The Ultegra Di2 group is a more affordable version of the Dura Ace Di2 group, so you can enjoy many of the benefits, without the high price tag. These levers have a sleek, mean look to them that will polish off any serious road rig. They're also slimmer and lighter than their mechanical counterparts, and they've got more adjustability to let you customize the feel of your setup.