Mobile Phone Flex Grip Flex Boom Headset Noise Canceling by Verizon 2.5mm Flex Boom Headset. Ear Sponge for extreme comfort included Flex Grip provides maximum stability for all-day wearing comfort Attractive design and easy one-handed placement Answer or end calls from the in-line button; button also activates voice dialing Superior Sound Clarity. Noise-canceling Flex Boom microphone reduces background noise so you can be heard clearly