Sold as 1 Each. Flex-Phones headphones now with a steel-reinforced, gooseneck microphone, volume control and USB connector, ideal for today's technologies. Headband: Padded EVA Foam. HamiltonBuhl Flex-Phones headsets are the safe, non-toxic, BPA-free, soft, flexible, nearly indestructible units. Flex-Phone headsets are ideal for remote, at-home use or in school. The gooseneck microphone can be easily positioned for optimal communication. Extremely clear stereo sound quality and comfortable leatherette ear cushions.