DuraFlexII™ flexible boom molds into the exact position you need. Noise canceling microphone filters out ambient noise for spectacular sound clarity. Full-size foam ear cushions help you stay comfortable and focused. Rugged boom turret provides durability and reliability. PeakStop™ technology protects against sudden, loud sound spikes. Amplifier (GNNGN8000MPA/GNNGN8210), sold separately, is required for operation.