Over The Ear Hands-free Headset,Changeable Headband Headset for mobile phones easily switches between headband and over-the-ear styles. Detachable headband fits around back of upper neck, conforms to any hairstyle. Attachable over-the-ear clip is comfortable and unobtrusive. Telescoping microphone boom rotates to accommodate use on left or right ear. Includes in-line volume control with mute button. Superior quality and technology deliver clear reception and transmission. 4' cord. 2.5mm plug.