
I couldn't get the microscope to work because it couldn't read any of the 3 SD cards I've tried, including previously formatted and reformatted ones. When inserting the cards, the message "Please insert SD card" came up. From this point on, nothing else was possible but to press the menu button with the crossed out SD card symbol. Connected, disconnected, reset twice, tried different SD cards of different sizes. Without a map, the microscope was useless. The documentation contained Chinese characters and illustrations printed over English text, making it unreadable. The disk contained an executable file that could not be opened on any of the three computers. They desperately needed a microscope and were annoyed with poor quality control. The seller did not respond to the letter.

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