If defective on arrival, the customer will receive a comprehensive refund instantly and no return in the miner is required. After working with electrical power-hungry S19 versions For some time, switching towards the S21e XP Hyd 3U was like respiratory fresh new air. I ordered 3 from antminers23hyd.com and https://spencertjwhu.tusblogos.com/39894456/why-bitmain-antminer-is-a-smart-buy