Eliminate tangled cords and enjoy exceptional sound quality with the MX300 Retractable Mobile Headset from Plantronics. You"ll always enjoy crisp, clear sound with Plantronics patent-pending WindSmart™ technology, specifically designed to reduce whistles and static in windy environments. The MX300 also features the RetractPro™ automatic cord winder, allowing the cord to easily extend whenever you need to use the headset. When not in use, stowing this compact headset is just as quick and easy. And with the Flex Grip® earpiece, you can be sure this headset is comfortable to wear and stays in place, even during extended use -- unique, flexible tail rests behind earlobe, providing exceptionally stable and comfortable fit. Standard 2.5mm headset plug: Compatible with most headset-ready mobile phones including Audiovox, Kyocera, LG, Motorola, and most Samsung models.