(3 Pack) Best Buy(TM) Headset 3.5mm Over Head Wired Headphones by Dynex (Sealed in Polyethylene inMOGUL[TM] Approval Packaging Only) (From the Makers of Rocketfish) Free 2 to 3 Day EXPEDITED Shipping on All Orders. On-ear cushion design: Offers comfort for extended wear. Adjustable headband: Ensures a comfortable fit. Boom microphone: For clear, defined sound. In-line volume control: Allows for easy adjustment of the volume. Most mobile phones with a 2.5mm or 3.5mm audio jack.