Possible cause
You are looking through glass.
Solution
Remove the glass or change the viewing position to avoid it.
Poor image quality / Detection range reduced
Possible cause
These problems may occur during observation in adverse weather conditions (snow, 
rain, fog, etc.).
The image quality during the device operation at below 
zero temperatures is worse than at positive temperatures
Possible cause
In positive temperature conditions, objects being observed (surroundings and 
background) heat up differently because of thermal conductivity, thereby 
generating a high temperature contrast. Consequently, the image quality produced 
by the thermal imager will be better.
In low-temperature conditions, objects being observed (background) will cool down 
to roughly the same temperature, which leads to a greatly reduced temperature 
contrast and a degraded image quality. This is normal for all thermal imaging 
devices.
Smartphone or tablet PC cannot be connected to the device
Possible cause
Device password has been changed.
Solution
Delete the network and connect again using the password saved in the device.