Satisfying our shoppers is very important to us and we've been sorry our products didn’t meet your expectations. Underneath are the details of our refund and return coverage in your reference. Parcels are diligently ready with correct documentation and authorization to be certain seamless customs clearance, minimizing delays. *此设备需要比普通矿机更高的电压设置，这可能会导致其在大多数... https://used-antminer-bitmain20863.liberty-blog.com/33201128/buy-bitmain-antminer-s21-hyd-best-deals-and-discounts