[網絡設備] wireless internet on laptop question ， 描述： (help)

dandelion

my laptop doesn't have connection to wireless internet inside....
what can i buy so my laptop can use wireless internet?
also... where do they sell that?

please help!

dandelion

A/B/G/N??
which is faster??
also... about how much does a USB wireless adaptor cost?

dandelion

I'm from Hong Kong.. so i'm wondering where i can buy this
is the USB wireless adaptor any different from the internal Wi Fi that most new laptops have?

thanks for all the help