I heard that Guangde Jiewen Hearing has an expert event on December 28th? What kind of event is it? I don't want to consult with you on the phone.

1. the day of the event (December 28) some brands buy one get one free 2. special price ear canal type hearing aid from 890 yuan, special price computer adjustable digital ear canal type hearing aid from 1,600 yuan, ? 3. the day of the event with the machine users are complimentary gifts ?