...but, they offer a free replacement one time if anything goes wrong.
If I were you I would call your local Costco hearing center and make an appointment so you won't have to make two trips. They will give you a hearing exam and fit you.
I also learned that Kirkland puts their name on top brands. My devices are a Kirkland 9.0 model, but the newer 10.0 model is in Costco stores now. It is made by Sonova which makes the Phonak brand.
My ENT had referred me to an audiologist who tested me and tried to convince me that the only hearing aids that would work for me would be thousands of dollars. I asked her about Kirkland hearing aids and she told me that they are only for mild hearing loss and would not work. She lied. Also, I could finance my hearing aids if I needed to through her.
I am very happy with Costco. I walk in there to shop and they will clean my hearing aids for me and check them out.
Their batteries are inexpensive there as well.
Best of luck 
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