Quick and friendly response. Although the product does not work (drone eachineEx4) due to a manufacturing defect they refunded a large part of my money because in my country it is very expensive to return the package to China, I am very satisfied with the customer service. It is the first time that I buy in the app therefore i was afraid but it is clear that they are very serious and fair company.
Tip for consumers: Any questions you have about your purchase do not hesitate to contact the app support