ProHT Lightweight Headset (87070) with Microphone & Volume Control, Durable Stereo Headphones, 6 ft. cord, Black Lightweight design- Basic headphones made of lightweight, durable high impact plastic. Single side cord up to 6 ft. Ear Cushion- Comfort-fit with a wide headband and foam-cushioned ear cups for added listening comfort. Height adjustable headband. Built-in microphone- Microphone with shirt clip for ideal position adjustable avoid howling symptoms happened by separated microphone and speakers. Adjustable flex-arm for microphone. In-line volume control- Convenient volume controller on cable. Compatibility- Mylar dome driver. Compatible with all sound cards and portable music devices. 3.5mm (miniature jack).