1.8m 3.5mm AUX Female to 2 Twin Left Right Splitter Red White Mixer Cable

3.5mm Stereo to Left Right Splitter. 1 x 3.5mm Stereo Female Socket to 2 x 3.5mm Stereo Plugs. 3.5mm Stereo Socket to 2x 3.5mm Stereo Plugs.

eBay