For the highest fidelity audio during high-stakes testing, the Active Noise Reducing Headphones help protect students’ hearing. Made with rugged ABS plastic for durability, they can connect to MP3 or multimedia/CD players with a 3.5mm plug or included ¼” adapter. A power switch on the over-the-ear earcups activates the noise reduction feature & it also has a 5’ cord with in-line volume control.