The 4DLX Classic is a general aviation style headset at a price to fit any budget. The dual volume controls allow for independent volume adjustment in each ear dome and the precision flex boom, with noise canceling electrets microphone, provides exact positioning. Wide, comfortable air-pillow headpad. Combined liquid and foam ear seals. Stereo/mono switchable. NRR 24dB. Mic muff and cloth ear seal covers included. 3-year warranty.