There was a problem with FedEx.
Fedex in this country was instructed to submit a customs refund application together with the exchange.
The problem is that I have to write the amount I have to write on my invoice for $ 449, if I write $ 80, I will not get a refund of the tariff, and the exchanged product will have to pay another $ 449 tariff on arrival.
When I wrote it for $ 449, PiMax came back home without shipment because I saw damage.
To solve this problem, give me the RMA return label.
(I have also communicated this to the Pimax Support Center.)
In order to avoid tariff problems, it is necessary to proceed to repair, not 1: 1 exchange,
To sum up, if the s / n number listed on the device of the product you received is different from the previous product, it will not be tax-exempt.