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

最高時去到 4.7Ghz
The maximum frequency is 4.7 GHz.

Cantonese Sentence Breakdown

最高 zeoi3 gou1
highest
si4
o'clock
time
when
hour
season
period
era
current
timely
often
continously
frequently
fashionable
opportune
sometimes…sometimes
a surname
maak6
arteries and veins
vein (on a leaf, insect wing etc)
blood vessels
network
pulse
underground water
system
medical record
pulsation
affectionately
lovingly
去到 heoi3 dou3
reach