Topzone 2 Pc/set Audio Adapters: A) 3.5mm Stereo Jack to 2.5mm Stereo Plug. B) 2.5mm Stereo Jack to 3.5mm Stereo Plug. Great for use with Cellular Phones, Mp3 Players Conveniently Converts a 3.5mm into a 2.5mm Stereo Jack or 2.5mm into a 3.5mm Stereo Jack 24 Gold-Plated