Enables extension of EcoFlow Extra Battery Cables when connecting your EcoFlow DELTA Pro 3, DELTA Pro, DELTA 2 Max, or DELTA 3 Plus to the EcoFlow Smart Generator 4000 (Dual Fuel) or Dual Fuel Generator. Note: While the EcoFlow Extra Battery Cable can also connect to other EcoFlow products, this connector is specifically designed for extending the cable only when connecting the above power stations to the EcoFlow Smart Generator 4000 (Dual Fuel). This connector supports a maximum extension length of 15 meters, which means up to 3*EcoFlow Extra Battery Cable (5m) can be connected. Extending beyond this length may cause functional issues. *EcoFlow Extra Battery Cablehttps://us.ecoflow.com/products/extra-battery-cable