If defective on arrival, the customer will receive a full refund quickly and no return of the miner is needed. The invest in/host choice is incredibly easy. You possess an Antminer S19 Professional for sale but give it to a bunch to keep it. Can l check out your https://buybitmainantminerl997193.wssblogs.com/39322559/buying-bitmain-antminer-s21-hydro-explained