How to pronounce 慳電 in Cantonese (7 out of 8):

冇錯佢對效能呀、慳電呀、保安嚟講係好事
Yes, it's good for efficiency, electricity, and security.

Cantonese Sentence Breakdown

冇錯 mou5 co3
not wrong; correct (spoken)
heoi5
he
she
it (Cantonese)
Mandarin equivalent: 他tā [他]
deoi3
right
correct
couple
pair
towards
at
for
to face
opposite
to treat (sb a certain way)
to match together
to adjust
to fit
to suit
to answer
to reply
classifier: couple
pair
to compare
to check
to adjust
效能 haau6 nang4
(noun) Function
haa1
(particle equivalent to 啊 after a vowel, expressing surprise or doubt)
慳電 haan1 din6
electricity saving
保安 bou2 on1
security guard
嚟講 lai4 gong2
regarding
hai6
(Cantonese) to be
to connect
to relate to
to tie up
to bind
to be (literary)
to involve
relation
relationship
consequence
yes
indeed
right
好事 hou2 si6
good deed