PACK OF 42 Flex-Phones USB Headsets with Steel-Reinforced Gooseneck Microphone. HamiltonBuhl Flex-Phones headsets are made of the same great construction as the best-selling Flex-Phones headphones and feature a steel-reinforced,gooseneck microphone, volume control and USB connector - developed specifically for Pre K-5. It?s the ideal companion for Chromebooks, PCs, Macs, or any device with a USB input.
