... switch key that makes the handset compatible with all the 3.5mm mobiles and computers, including the iPhone, Samsung, BlackBerry, Nokia, ... length:50-200cmCable diameter:2.8mmJack plug (gold-plating):3.5mmProduct dimension:22cm*6cm*5.2cmGW:192g/pcsMaterial:ABSAppearance:Rubber ... Southern America, Southeast Asia, Middle East, East Asia and etc. cord retro mobile headset with 3.5mm plug for iphone ipad