NDSI水晶保护盒结构及功能说明：(NDSIcrystalboxprotection)1、增加耳机插孔防尘塞；（theincreaseindust-proofheadphonejackplug.)2、增加USB插孔防尘塞；(increasethe USBplugsocketdust.)3、底壳背面增加孔位，手指往上推轻松取下主机；(Dikeholeonthebackofanincrease,pushingupfingerstoeasilyremovethehost.)4、可旋转180度；(canrotate180degrees.)5、查随杨旋转任意角度。(withthehostrotatingshaftatanyangle.)