Earhook headphones in ear headphones designed specifically to fit smaller ears twistlock technology for secure fit ambient noise awareness for safety flexsoft for extra comfort series yurbuds focus type of fitting in ear transmission mode wired features gold plated jacks headset compatible with ios function rotatable earcups frequency response 20 20000 hz driver 142 mm type of cable symmetrical jack 35 mm jack shape l shaped earcup material silic