Features Electrostatic driver Dynamic DriverKZ ZEX is the first dual driver electrostaticdynamic driver in ear earphone from KZ brand The music distortion rate is even lower than the balanced armature High density SoundThe high density sounds and hi res audio performance of the electrostatic KZ ZEX with better vocal resonance louder and clearer sounds performance Better Than ABalanced ArmatureIn the same 20KHz high frequency its sensitivity even better performance than a balanced armature Easier to DriveCompared to the traditional high voltage electrostatic driver low voltage electrostatic is much easier to drive in slim sized earphones Much More StableThe better performance for low voltage electrostatic technology quality consistency is much more stable than dynamicbalanced armature SpecificationsBrand KZProduct KZ ZEXSensitivity 103dBResistance 25ΩFrequency 20hz 40khzUnit type Electrostatic driver Dynamic driverPlug Type 3 5mmPin Type 0 75mmLine Length 120cmUnit type Double line silver plated cable Package Including 1 x Headsets1 x User Manual