This silver-colored adapter features two jacks meant to extend the reach of your audio system. The adapter has one, 3-pin, female XLR plug and one, male 6.3mm mono audio jack. By allowing you to connect XLR and 6.3mm (otherwise known as quarter inch) audio cables, this adapter can help greatly extend the capabilities of your audio equipment. XLR and 6.3mm audio are two of the most common connectors employed in consumer audio systems, and this adapter will allow them to forge easy, resilient connections between the two. Three pin XLR connectors provide a balanced audio signal that has become a nearly universal standard for hooking up microphones to amplifiers. Though some older public address systems use 3-pin XLR connectors for hooking up loudspeakers, 3-pin XLR has been largely superseded in this task by the higher-fidelity Speakon connector. Quarter inch audio jacks are frequently found on PCs, laptops, and consumer electronic devices such as Mp3 players. 6.3mm in diameter, these jacks employ plugs with a tip-ring-shield construction to produce a high-fidelity audio experience in a diminutive package. They come in both mono and stereo varieties.