TopColor is specialized in electronic products in 2007, and start manufacturer in 2015 for many clients overseas. In 2017, TopColor set a department for mining products, and now TopColor is a leading distributor of Bitmain mining machines, a professional manufacturer and distributor of all Asic miner,Antminer, Loveminers, Whatsminer, Avalon miners, and all hardware solutions for block chain miners , and our activities include Research & Development, Manufacture, Sale, Engineering, Construction and After-sales service. we always pay much attention to quality control and customer service. In order to provide customers with the best products, we have implemented ISO9001 system in production, which are conducted in accordance with international standards. We always focus on providing customers with high quality products, competitive prices and comprehensive services. Please feel free to contact us for details if you are interested in any of our series.With fast development and lasting technique innovation, TopColor is looking forward to offering you better services and establishing mutually beneficial business relationships with you

1) Free Testing One by One to Check the hashrate

2) Deep Clean and with New Net and New Original Package

3) If need free to do overclocking for customer

4) Free technical consultation

5) Also have one- stop Hosting service

6) Support Door to Door including Tax Transportation Service

Notice and Warranty   Miners are customized products according to customer's requirements, and therefore investments need to be cautious. The machine is a second-hand machine,Can't make a third sale,So 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. 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.  
3, If not paid the money, the price will change at any time ,Because the price of virtual currency is changing  
4, Dont bargaining about the price, Because we are second-hand machines, the new and old levels are different, and the prices are definitely different.  
5, Price include pre-order price and in-stock price,Please contact the customer to confirm the latest price before placing an order.
 

1.Q: How could I get used Bitcoin Miner Antminer samples?
A: If you need to order sample for checking-up,we would like to ask you to pay for the samples and courier freight. We send the
samples to you only after receipt of your payment.if you have an courier account,you can send your courier to collect samples from
our company or send us the samples charge together with the courier cost.

2.Q: How much the Courier freight will be for the samples?
A: Courier freight depends on weight and carton size, destinations and other relating factors.

3.Q: How can I get your price list?
A: Please leave your contact way such as Email/Whatsapp/Skype/Trademanager to us. We will contact you and pass our quotation
sheet to you as soon as possible.

4.Q:When can I get the price?
A: We usually quote within 12 hours after we get your inquiry. If you are very urgent to get the price, please call us or tell us
in your email so that we will regard your inquiry priority.

5.Q: How long can I expect to get the Bitmain Antminer S9i miner sample?
A: After you pay the sample charge and send us confirmed files, the samples will be ready for delivery in 2-3 days.
The samples will be sent to you via express and arrive in 3-5 workdays.
You can use your own express account or prepay us if you do not have an account.