SHIMANO RD-R8150 Ultegra Di2 rear derailleur

Now Simplified With A Single Derailleur Cage Length, The New 12-Speed Shimano Ultegra R8150 Rear Derailleur Packs Our Fastest, Most Precise Shifting Into A More Approachable Option. With Our Fastest, Most Accurate Shifting, The New 12-Speed Ultegra R8150 Rear Derailleur Is More Versatile Than Ever Thanks To A Single Cage Length Option That Is Compatible With 28-34t Low Sprockets. Features: - Our Fastest Ever Rear Shifting, 58% Faster Than Rd-R9150 - Compact Design Includes An Integrated Wireless Unit, Charger, And Switch - Wider Range Capacity: Max. Low Sprocket: 34t Led Status Indicator: - Battery Indicator - Pairing - Adjust Mode, Etc. Specifications: - Average Weight: 262 - Remarks: W/O Bracket Spec. Available - Firmware Update By E-Tube Project: Yes - Total Capacity: 39t - Charging Port (Pcs): 1 - B-Axle_Hollow Axle: Yes - B-Axle 2_Hollow Axle: Yes - Mount_Direct Attachment (Conventional): Yes - Mount_Direct Mount: Yes - Fluoric Coated Link Bushings: 4 - Low Sprocket_Max.: 34t - Low Sprocket_Min.: 30t - Max. Front Difference: 16t - Pulley_G Pulley Bearing: Yes - Pulley_Sunken Type Pulley Bolt: Yes - Pulley_Teeth: 11 - Pulley_T Pulley Bearing: Yes - Top-Normal Spring Type_Shimano Shadow Rd: Yes - Top Sprocket_Max.: 14t - Top Sprocket_Min.: 11t - Rear Speeds: 12 - Charging Cable: Ew-Ec300 - Di2 Connectivity Wired_Di2 Shifting: Yes - Di2 Connectivity Wireless_Ant Private (*2)_Adjust Mode Information: Yes - Di2 Connectivity Wireless_Ant Private (*2)_Di2 Battery Level: Yes - Di2 Connectivity Wireless_Ant Private (*2)_Gear Position: Yes - Di2 Connectivity Wireless_Ant Private (*2)_Shimano Steps Data Items (*3): Yes - Di2 Connectivity Wireless_Bluetooth® Le Custom (*1)_Adjust Mode Information: Yes - Di2 Connectivity Wireless_Bluetooth® Le Custom (*1)_Compatible With E-Tube Project: Yes - Di2 Connectivity Wireless_Bluetooth® Le Custom (*1)_Compatible With E-Tube Ride: Yes - Di2 Connectivity Wireless_Bluetooth® Le Custom (*1)_Di2 Battery Level: Yes - Di2 Connectivity Wireless_Bluetooth® Le Custom (*1)_Gear Position: Yes - Di2 Connectivity Wireless_Bluetooth® Le Custom (*1)_Shimano Steps Data Items (*3): Yes - Di2 Connectivity Wireless_Di2 Shifting: Yes - Led For System Status: Yes