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What is Thanksgiving Thanksgiving is a national holiday in the United States, Canada, and other countries that cele...

What Is Black Friday? The day after Thanksgiving is generally known as Black Friday, which also refers to the fourt...

What Is Optical Zoom? Optical zoom is the process of adjusting the physical elements of a camera lens to zoom in or...

Halloween is celebrated in many countries on October 31st. There are many theories about the origin of Halloween in...

As more and more people join in wildlife observation activities, more and more knowledge about tracking cameras is ...

What are Indoor Security Cameras? Indoor security cameras refer to cameras installed inside buildings to monitor ...