https://qooah.com/2015/06/08/samsung-%e6%96%b0%e5%b0%88%e5%88%a9-spen-%e5%8f%af%e4%bb%a5%e8%87%aa%e8%a1%8c%e5%bd%88%e5%87%ba-note-5%e6%9c%89%e6%9c%9b%e6%8e%a1%e7%94%a8/