Mr.Evgeniy comes from Ukraine, selling the electronic products like speakers, cameras and some phone accessories online. His monthly memory card demand is almost 10,000 pieces. Since each memory card is printed with his LOGO, the quality represents his reputation for him. His requirement is that the bad card rate of the memory card cannot be higher than 2%,we Eletree can do that and promise offering 1 year warranty. Besides we offer service of installing the Raspberry PI for him. We have been working with him for 3 years,building trust with each other.