This 2-pack of black Sony MDR-ZX110 On-Ear Headphones utilizes 30mm dynamic drivers to deliver an extended low-frequency response of 12 Hz to 22 kHz, so you can enjoy all kinds of music on-the-go. For improved portability, the earcups can swivel flat and fold up into a more compact form factor. The 3.9' Y-type cable helps prevent tangles.