The Monster Beats By Dr. Dre Pro Over-the-Ear Headphones are the reference headphones designed by audio professionals for audio professionals. It delivers balanced yet powerful sound across the spectrum. Built from strong yet lightweight aluminum, Beats Pro resists vibrations, so you never hear unwanted artifacts even after years of heavy duty use. Dual input/output cable ports let you share mixes by daisy-chaining headphones. Flip-up ear cups let you monitor the room, cans on head. Plush, washable ear cushions provide comfort and passive noise isolation. •Acoustically tuned by professionals •Patent pending input/output feature lets you daisy-chain headphones and share mixes •Unique flip-up ear cups •Rugged metal construction ensures durability, resists vibrations and keeps music free of unwanted artifacts •Plush ear cushions for ultra comfortable listening and superior passive sound isolation