... card function -Audio output, input -Retractable headband design Multi-function card headsetDirect Reading TF card functionAudio output, ... earmuffsSupport for Apple, BlackBerry, Nokia, 3.5MM audio port phone Computers, laptops and speakersRetractable headband design Simple ... the Support for Apple, BlackBerry, Nokia, 3.5MM audio port phone Computers, laptops .. Volume Remote ControlEmbedded Volume up ...