FLIGHTCOM 4X CLASSIC The 4DX "Classic" offers the same affordable durability and clear communications as the 4DLX Classic with out the pillow headpad and has a 2 year warranty instead of 3 years. Includes foam ear seals, electret microphone with metal-hinged boom and wind screen, stereo/mono switch, single volume control, easy-to-position wire articulated boom with fingertip adjustable screws, cloth earseal covers, and 3 year factory warranty.