SRAM AXS Extension Cord for Bosch BES3The SRAM AXS extension cord is an optional item to the Eagle Powertrain system to power the Transmission derailleur by the main system battery instead of a separate AXS battery. The extension cord interfaces to the derailleurs AXS battery port and is designed to be internally routed through the frame directly to the SRAM DU. The extension cord is available in different length to accommodate frame sizes and design. Features Works with any AXS derailleur Powers derailleur by the main system battery | Sram | Axs Extension Cord For Bosch Bes3 Bosch Bes3 880Mm