Unfortunately, we cannot offer returns or refunds for mining hardware due to the volatile nature of cryptocurrency mining difficulty and propensity for fraud. If a mining device is not operating properly upon arrival, we may offer an exchange or refund on a case by case basis. It is the buyer's responsibility to notify us about product defect within three (3) days of receiving the product. If a return is authorized, the buyer must return the product in its original packaging. Buyer pays for return shipping. In the event that we issue a refund, the refund will be given through the original payment method based on the dollar value of the purchase.