HP XA490AA#ABA Premium Digital Headsets (Silver) AutoSwap-- Choose preferred mic position and your stereo sound is set for you Over-the-head design with padded, adjustable headband for maximum comfort. Plush floating earpads that reduce pressure points and long-lasting comfort No worry about left or right ear with rotating noise cancelling microphone with adjustable boom System Requirements: Available USB port 2.0; MS Windows - XP, Vista, Win7 Whats in the Box: HP Premium Digital Headsets; Quick start guide