To meet the customers' over-expected pleasure , now we have our potent staff to offer our greatest general service which includes internet marketing, sales, planning, output, quality controlling, packing, warehousing and logistics for Antminer S9 Watts, Mini-doge 185Mh/s , antminer s9 pro , M21s 50t ,antminer L7 . We are willing to cooperate with business friends from at home and abroad and create a great future together. The product will supply to all over the world, such as Europe, America, Australia,Benin, Estonia,Benin, Istanbul.We set a strict quality control system. We have return and exchange policy, and you can exchange within 7 days after receive the wigs if it is in new station and we service repairing free for our products. Please feel free to contact us for further information if you have any questions. We are glad to work for every client.