Please noticed:

1. All parcels will be sent by the fastest logistics method, such as DHL, UPS, FEDEX etc.

2. For mass order or technical support, please contact with sales personnel directly.

3. Kindly note that the required input voltage is 220V, and the wrong input voltage may cause damage to the miner.

4. These risks maybe related to changes in the exchange rate of the cryptocurrency or to changes in the algorithm used to mine the cryptocurrency. Please consider carefully before you make a purchase.

5. Golden Brother Tech is committed to providing more blockchain products with high return rates. If you have any problems about tariffs or farm construction issues, please feel free to contact us.

6. Please add passport number or CPF for Russian customers. Thank you!

After-sales service:

1. About the used miners:

Before each used miner is delivered, it will be strictly tested by professionals to ensure the hash rate of the miner and provide customers with test videos/pictures and status pages if you need. We will provide free maintenance service within 45 days after delivery, and the round-trip freight will be borne by the customer. In addition, we do not exclude providing daily use problem solving or other related services within a reasonable range.

2. About brand-new miners:

All new miners have after-sales service provided which provided by the original manufacturer. If necessary, please read the user manual and contact the after-sales service center.