Gratifying our customers is very important to us and we're sorry our item didn’t satisfy your expectations. Below are the details of our refund and return policy 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。 Observe: The price of copyright mining equipment needs to be altered commonly in accordance with ... https://judahqjarf.educationalimpactblog.com/54870908/buy-bitmain-antminer-ks3-ultimate-mining-performance-guide