The listing, Headphones with Microphone has ended.
I paid more than $100 for this headset when I got a job doing telemarketing from home. I don't do it anymore so maybe someone else can use them. The connector is a standard telephone jack plug. Adjustable headset with pillow-soft ear cushions and an adjustable boom. Has volume control device on the cord. Worked great for me. You can talk on the phone and keep you hands free. Brand name is GN Netcom. Free shipping but minimum credits needed because I want to pack this securely.