Banggood Dear customer, thank you for choosing Banggood and sorry for your any inconvenience came up with the product. There is a description about how to use the product in the above page, have you notice that? If you have any after-sale problem, please don’t hesitate to contact us:http://www.banggood.com/Contact-Us_hi111. We are glad to help you to solve the problem and give you a proper solution as soon as possible. Thanks for your kindly understanding. Have a nice day.                                                                                                                                                                   Best regards, Banggood Team 

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