Blue Skull and Crossbones Earbuds feature 3-D vinyl embellishments attached to headphones. You can plug these cool earbuds into any MP3, CD, audio player or smartphone that has a 3 1/2mm connector. Earbuds have noise isolation earphones for a custom fit that's comfortable in your ear, and they block out ambient noise so you can enjoy your tunes without distractions. Blue Skull and Crossbones Earbuds have 9mm speakers that are surrounded by soft silicone. White cord measures approximately 48in long end to end.