We have developed this help page to assist you with standard information you may need, It also includes all the frequently asked questions from our customers.You can browse by categories you are interested or you can search some information you want to know at knowledge base by entering keywords in the search bar. If you can not get a satisfied answer here,Our customer service representative will help you figure it out.You can email to sales@iDigitester.com or call us on 0086-18120725205.