The 1/4 inch stereo jack could be unscrewed to reveal a mini-jack that will fit portable CD players and MP-3 players. They are very pretty and line up with Crocs standard of well built shoes. I run sound at multiple venues and I usually use sm58s for vocals because they?re incredibly predictable and work on almost any voice. Parole da musicista, non mi aspettavo questa qualità per 80 euro! I will check the other 2 later but do not expect much. Sitzen sehr bequem und die Ohren werden nicht heiß. After doing some recording, it dawned on me that i was using low quality MIC and patch cables from the pre-amp to the sound card. Also, they had a terrible and strong plastic/chemical smell when we first opened them up, and it lasted a long time. Bought some fitflop shoes which I wore to all occasions during summer so comfy. Pros:Really Comfy with glasses and haven?t fallen off my ears.