Genuine SRAM eTap / AXS battery charger for wireless electronic shifting systems. Details: Compatibility: Designed for use with SRAM eTap and AXS wireless batteries. Condition: Fully tested, confirmed to power on, and in excellent working order. Performance: Reliable and essential for keeping your wireless drivetrain charged and ready for the road. This is the standard replacement charger required for all SRAM wireless road and mountain bike shifting components.