Plugfones are popular with those employed in the manufacturing, fabricating, and industrial fields. * Looks and protects just like the ear protection used in most industrial and factory work places. * Act as hearing protection ear buds. * Earplug earphones that protect your ears and allow you to listen to music at a safe level. * 3.5 mm speaker which delivers the audio to your ear through a tiny hole at the tip of the earplug.