50mm-diameter phones combine superior sensitivity with high-power input capabilities that let you catch every nuance of the music. Ergonomic design with push-in shoulder pad gives you flexible movement and comfortable handsfree single-ear listening. Highly insulated, tightly closed structure captures delicate sounds. Mono switch facilitates single-ear listening. With a coiled lead which makes it impossible to get tangled! These headphones are great, and you can get them for under $100!