Mobile Phone Flex Grip Flex Boom Headset Noise Canceling by Verizon - Compatible with ALL 3.5mm jacks and 2.5mm audio ports. 2.5mm Adapter Included with Extra 2 Ear Sponges. Can be used in either ear. The Flexible hook on the bottom holds Headset to your ear over the earlobe. Beautiful, slick and most of all, COMFORTABLE