After sales issues with backpack advertising machines

1. There is one USB 2.0 black interface:

No response when inserting the mouse, the mouse does not light up and does not move when clicked

Answer: Click on the device number multiple times to enter developer mode. In developer mode, turn off USB debugging, open settings, click on Toobox, click on USB mode, and switch to Host mode

2. Click on the screen to see the lines

Answer: Click on the device number multiple times to enter developer mode, and turn off touch feedback and touchpoints in developer mode

Domestic small gray cloud problem

3. @ JTA - Technical? Can you insert a card reader into your backpack?

Answer: You can directly insert the card reader into the USB port or have an interface on the motherboard to directly access the memory card

4. @ JTA - Technical? How to determine if the battery is fully charged?

Answer: The charger displays a red light when charging, and a green light when fully charged

5. @ JTA - Technical? What is the ambient temperature for your machine's use, 0-55 degrees? If it's below zero, because it's very cold in winter in foreign countries

Answer: The endurance temperature is from minus ten to 60 degrees Celsius, and the operating temperature is from zero to fifty one degrees Celsius. This is written in the specification book, which is relatively conservative. It has been tested several times and there is no problem within minus ten degrees Celsius