• Wireless Protocols: ANT private, Bluetooth LE (wireless)
• Number of E-Tube Ports: 2
• Number of E-Tube Connections: 0
• Master Unit: no
• Compatible Systems: master unit with Bluetooth technology
• Cable Routing: internal or external
• Functions: shift position, Di2 battery charge status , adjust mode display (with PRO bike computer)
• Others: E-Tube-project guarantees firmware updates
• Technology: E-Tube, Shimano D-Fly