Kov vaj huam sib luag tau nce ntau zuj zus nyob rau hauv ntau yam teb vim hais tias ntawm ntau thiab ntau sai thiab paub tab capacitive touch screen technology.
Nrog kev xyaum ua haujlwm pab pawg thiab ntau xyoo dhau los ntawm kev paub txog kev txhim kho cov duab kov, Grahowlet yog tus pioneer ntawm kov vaj huam sib luag daim ntawv thov kev lag luam, muaj kev pabcuam dav dav ntawm cov khoom siv hauv txhua qhov kev lag luam thiab muaj kev koom tes tob nrog ntau pua tus neeg siv khoom los ntawm ntau txoj haujlwm thoob ntiaj teb.
