Cov nqi pib siab dua: Piv rau cov hnub ci vaj huam sib luag ru tsev, cov vuas hnub ci feem ntau muaj cov nqi pib nqis peev ntau dua.
Kev Siv Hluav Taws Xob Tsawg Tsawg: Feem ntau, lub zog hloov pauv ntawm cov vuas hnub ci yuav qis dua me ntsis ntawm cov qauv hnub ci.
Scarcity of Installation Services: Tam sim no, muaj ob peb lub tuam txhab muab kev pab cuam installation rau hnub ci ru tsev vuas, uas tej zaum yuav ua rau ib co inconvenience thaum lub installation txheej txheem.
