Thaum siv 2pin US & 3pin AU qhov hluav taws xob, cov ntsiab lus hauv qab no yuav tsum tau sau tseg. Ua ntej, xyuas kom meej lub hwj huam mov voltage yog siv kom tsis txhob muaj kev puas tsuaj rau cov khoom siv hluav taws xob. Qhov thib ob, ntxig lub ntsaws ntsaws ruaj ruaj kom tsis txhob khoov lossis ua rau lub qhov (socket) puas. Tsis tas li ntawd, nws yog ib qho tsim nyog yuav tsum tsis tu ncua xyuas cov xwm txheej ua haujlwm ntawm lub qhov (socket) thiab cov keyboards, thiab tam sim ntawd hloov lossis kho qhov txawv txav.