How to pronounce 毫米 in Cantonese (2 out of 5):

28毫米嘅揚聲器同高階數碼晶片
A 28mm speaker and high-end digital chips.

Cantonese Sentence Breakdown

毫米 hou4 mai5
millimeter
koi3
indignant
generous
to sigh (with emotion)
揚聲器 joeng4 seng1 hei3
loudspeaker
tung4
and
高階 gou1 gaai1
high-end
數碼 sou3 ma5
digital
晶片 zing1 pin3
chip