... headset 1.good sound 2.retro classic style 3.Mixed colors. 4.Volume +/- control,ON/OFF ... makes the handset compatible with all the 3.5mm mobiles and computers, including the iPhone, Samsung, BlackBerry, Nokia, MacBook, ... 50-200cmCable diameter:2.8mmJack plug (gold-plating):3.5mmProduct dimension:22cm*6cm*5.2cmGW:192g/pcsMaterial: ... and etc. cord retro mobile headset with 3.5mm plug for iphone ipad