SeaKing Stores › 25ft Gen 2 RGB extension cable - RGB-25 25ft Gen 2 RGB extension cable - RGB-25 £38.00 25ft Gen 2 RGB extension cable - RGB-25. 25 ft Color Optix Gen-2 Extension Cable; part of Gen-2 Color Optix wiring/control ecosystem. 25 ft. Add To Cart Added! 25ft Gen 2 RGB extension cable - RGB-25. 25 ft Color Optix Gen-2 Extension Cable; part of Gen-2 Color Optix wiring/control ecosystem. 25 ft.