驅蚊器 有用嗎

oI tried one, but forgot the brand name, bought it at Jusco around $200 to $300,
I am not sure if it works for all insects. I place it near some small flies and
insects, they have no response.

For mosquito, coil is good but it smells
For flies, tape is good but it looks ugly
For cockroach , house is good but it looks ugly

all cheaper than electronic devices

沒有這麼好的東西,因為科技還未達到,不過可能不久將來會有,