As the name implies, this one takes a single stereo pair from your device and makes two out of it. Use this on long road trips with your kids (if they like the same movie) or just to monitor new songs you’ve written on your iPhone. This is a very handy cable. It features one 1/8" (3.5mm) TRS stereo male plug and two 1/8" (3.5mm) TRS stereo female jacks. Length: 11.8" (30cm).