How to pronounce 毫米 in Cantonese (4 out of 5):

佢亦透過 28 毫米嘅揚聲器
It also uses a 28mm speaker.

Cantonese Sentence Breakdown

heoi5
he
she
it (Cantonese)
Mandarin equivalent: 他tā [他]
jik6
also
likewise
透過 tau3 gwo3
through
毫米 hou4 mai5
millimeter
koi3
indignant
generous
to sigh (with emotion)
揚聲器 joeng4 seng1 hei3
loudspeaker