In case the hashrate of the despatched mining product is decreased than 300TH/s, BITMAIN will refund the real difference Dependant on $/T. In China, We have now obtained many times, this time is easily the most prosperous and most satisfactory, a sincere and realiable Chinese company! I take the https://raymondntiep.blogsidea.com/46114434/quick-guide-to-buying-antminer-s19-pro