In summary, the Antminer S21 is a video game-changer on this planet of Bitcoin mining. With its unparalleled hashrate and Vitality efficiency, it's certain to revolutionize just how miners tactic BTC mining. If your hashrate from the delivered mining machine is lower than 166TH/s, BITMAIN will refund the difference In https://batchminer.com/brand/bitmain/