... , backward selections featureHigher cortical earmuffsSupport for Apple, BlackBerry, Nokia, 3.5MM audio port phone Computers, laptops and speakersRetractable headband design Simple headband design ... . Audio output /input functionWhen the Support for Apple, BlackBerry, Nokia, 3.5MM audio port phone Computers, laptops .. Volume Remote ControlEmbedded Volume up / down ...