If defective on arrival, the client will get a whole refund promptly and no return of your miner is needed.?? ?? ?? ?? ?? ?? ?? ??? ?? ??? ???? ??? ?? ????? ????????? ???? ??? ?????? ???? ????? ???? ????? ???? ? ?????? ?????? ?? ?? ??? ???? ???? ???.?? ?????? ?? ???? ?????? ?????? ????????? ?? ???? ?? ???? ??? ????? ? ?? ????? ????? ?????.Microsoft