This splitter has 2x large (6.35mm) stereo jack sockets connected to a mini (3.5mm) stereo jack plug with a 10cm cable. It has 10cm flexible cable and high quality moulded connectors for a great performance and reliability. This adaptor allows you to plug 2 x 6.35mm headphones into a device such as your iPod or phone which requires just 1 x 3.5mm jack.