material: ABS button, button:keycap(With X type scissors Angle, arms exhibition suspension Angle)+loam cake; keyboard head: ABS+PCmaterial, thickness 2.5mm;18mm ultra-thin(support:keyboard thickness is 9mm);bluetooth connector 3.0, 78 key ultra-thin,support Windows 7/Vista/XP/2000/OSX/Linux(32/64bits)/Windows  Mobile ,Iphone,iPad