If defective on arrival, the customer will get a entire refund immediately and no return from the miner is required. I'm very happy with my invest in (Elphapex Household). Furthermore, I need to thank Faye for the excellent assistance she delivered; she answered all my questions Anytime I required. https://buy-antminer-s19-pro97717.blog4youth.com/39954760/what-you-should-know-before-buying-an-antminer