Coby CV121 Deep Bass Stereo Headphones with In-line Volume Control, Black (Discontinued by Manufacturer) High-performance 40mm driver units deliver deep bass sound In-line volume control Large cushioned ear pads for comfort Self-adjusting ear cups Single-sided cord minimizes tangles. Connectivity Technology: Wired Powerful 40mm neodymium drivers Volume control with stereo/mono switch Adjustable headband for maximum comfort Single-sided cord Gold plated 3.5mm stereo plug