Self-adjusting, pivoting ear cups assure a comfortable fit. Headset frame is chrome plated hardened spring steel. Heavy chrome plated full swivel microphone boom. Microphone boom rotates 180 degrees for use on either side of head. M-80 noise-canceling electret microphone with windscreen. Easy grab volume adjust control. Ear cups are high impact ABS plastic. Super-tough and lightweight. Plug type: 0.25 inch, 3 conductor.