Kev faib cov xov xwm kis kab mob
Cov xov tooj sib kis tau tuaj yeem faib ua ob pawg, uas yog kev tshaj xov xwm xa xov xwm thiab tsis tshaj tawm xov xwm sib kis. Hauv kev xa xov xwm tawm, xov xwm hluav taws xob tau coj los nthuav tawm raws qhov nruab nrab ntawm cov khoom nruab nrab (tooj liab hlau lossis hluav taws xob fiber ntau), thaum tsis tshaj tawm cov xov xwm xa mus yog hais txog qhov chaw pub dawb. Kev sib kis ntawm cov xov hluav taws xob hauv xov hluav taws xob hauv cov xov xwm tsis yog coj ua yog hu ua wireless kis.