Hom Hais Lus Tseem Ceeb (2)

Cov neeg hais lus tau muab faib ua cov neeg hais lus sab hauv thiab cov neeg hais lus sab nraud, nrog cov neeg hais lus sab nraud feem ntau xa mus rau cov neeg hais lus. Tus hais lus built-in hais txog MP4 player uas muaj tus hais lus built-in, kom cov neeg siv tuaj yeem mloog tsis tau tsuas yog mloog lub suab tawm los ntawm MP4 player los ntawm lub mloog pob ntseg nkaus xwb, tab sis kuj los ntawm tus hais lus built-in. Lub MP4 player nrog cov hais lus built-in tshem tawm qhov xav tau ntawm tus hais lus sab nraud thiab zam qhov tsis yooj yim ntawm kev hnav lub mloog pob ntseg rau lub sijhawm ntev.