StarTech.com Slim Stereo Splitter Cable - 3.5mm Male to 2x 3.5mm Female

Split one headphone jack into two separate jacks. The MUY1MFFS Slim 3.5mm Stereo Splitter Cable/Y-cable features one 3.5 mm male and two 3.5 mm female audio connectors, splitting a single headphone jack into two. A practical, cost-effective audio solution, the 3.5 mm stereo splitter cable features slim connector molding that fits easily into a 3.5 mm headphone jack, even if the iPod/iPhone/iPad/MP3 player is in a protective case.

Price: 5.62 from EE Store