Whatsminer M31S

We offer different options. As some people don’t like using their credit cards online, there are other solutions.

JPStream’s preferred payment method is via debit order. Our automated billing system offers a convenient and secure debit order facility.

For people living in Japan we accept ATM transfer

We accept cryptocurrencies as a modern payment system.

• Bitcoin;
• Bitcoin Cash;
• Ethereum;

(Ripple and Monacoin Accepted)

Please contact your account assistant for additional information about crypto payment options.

We do not accept Paypal

All of our products are 100% new original factory.

Fast Shipping
Ship out the goods within one week after confirming the payment. The express delivery time around 1 ~ 2 Business Weeks.

100% Excellent Service
Your satisfaction is the core goal for everyone, We are appreciated to service to you, all of us will try our best to meet your requests.

All our product come with the following warranty level.

• Smartphone warranty: One Year with Free Repair
• Machine Miner: Usual 180 days warranty.
• Other IoT products: Warranty One Year
• Trade Insurance: Included

Information about Miners
Miners are customized products according to customer\'s request. Price will be adjusted with the fluctuation of market. Please invest carefully and confirm with us before your payment.

• Financial Policy: No refund and return after the payment.
• Machine Miner: Usual 180 days warranty.
• Out Of Warranty: If it is out of warranty, we will provide paid maintenance service

Warranty Invalid:

• Customer removes/replaces any components by himself without receiving permission from manufacturer first
• Damage caused by poor power supply, lightning or voltage surges
• Burnt parts on hash boards or chips
• Miner/boards/components damage due to water immersion or corrosion due to wet environment
• Over Clock

Please contact with your executive assistant as soon as possible if you get the thing happened above. We will help you contact the service center to solve the problems as per your request.