3.5mm Stereo Plug to 2x3.5mm Mono Jack Adapter. This 3.5mm Stereo Plug to 2x3.5mm Mono Jack Adapter converts two 3.5mm Mono Plugs to single 3.5mm Stereo Plug. With its full molded construction, this splitter will split the audio signal without a loss of quality. Black molded plastic construction. Nickel-plated contacts. Connector 1: 3.5mm Stereo Plug. Connector 2: 2x3.5mm Mono Jack. Use with PC, stereo, MP3 players. External Length / Height: 35mm. Body width: 22mm.