Hdmihome 3.5mm Stereo Male to Double 3.5mm Female Audio Headphone Y Splitter Cable with Volume Control Switch 3.5mm Stereo Audio 1 Male to 2 Female Splitter Adapter With Volume Switch Connectors: 3.5mm 1 Male to 3.5mm 2 Female. With this adapter you and a friend can both listen to your music player at the same time. Dual-independent volume controls - set it as loud or quiet as you want. Plug two sets of 3.5mm headphones into one standard 3.5mm stereo socket with this adapter.