The Headphone Adaptor Cable by Hosa Technology is a single cable designed to convert a 3.5mm TRS to a 1/4 inch TRS connector. With a cable length of 25 feet, this new adaptor is perfect for connecting headphones to audio equipment and musical instruments. The TRS male 1/4 inch connector ensures a reliable connection for professional audio setups, making it a valuable addition to any musician or audio engineer's gear collection.