Enjoyable our shoppers is very important to us and we're sorry our products didn’t satisfy your anticipations. Down below are the small print of our refund and return plan on your reference. 挖矿硬件的使用寿命受使用强度、温度、湿度和灰尘等环境因素的影响。适当的维护和最佳条件可以显著延长其使用寿命。 Take note: The price of copyright mining equipment has to be altered routinely in accor... https://usedantminerbitmain95296.thelateblog.com/33607704/bitmain-antminer-s21-hydro-buy-best-places-to-purchase