The SRAM AXS extension cord is an optional item to the Eagle AXS system to power the 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 e-bike motor/battery. The extension cord is available in different length to accommodate frame sizes and design. Works with any AXS derailleur Powers derailleur by main system battery Compatible with Avinox M1 drive system