Risk warning: Because the value of miners is subject to market fluctuations, the number and price of this batch of orders will be locked after payment. If market prices rise, the price of this order will not increase. If market prices fall, there is no refund of this order. Attention: 1. An order must be paid within 24 hour, otherwise the order will be cancelled automatically. 2. Be sure to turn on a miner when the switch is at OFF. After-sale policies: Miners are customized products according to customer’s requirements, and therefore investments need to be cautious. Product’s after-sale service is as follows. Once the purchase is completed, it means the recognition of the policies. 1. No refund and return after the payment. 2. A 90-day warranty for miners. 3. Affected by the modes of payment/ USD exchange rate, the price of the product may be adjusted at any time, please contact customer service before buying. The following conditions will make the warranty invalid: 1. Disassembled machine, unauthorized changes, or replacement of components. 2. Damage caused by lightning strike, voltage surge, faulty power supply, etc. 3. Burnt circuit boards or chips. 4. Damage by water, damp or corrosion. In the case of the above, we will provide paid maintenance service. The freight fee of maintenance is paid by the buyer, and we are not responsible for the loss of income during the maintenance period.