This machine is designed for testing if lens have polarized function. After machine start, you could only see the white screen and hear the sound. Only when you wear the polarized lenses or put the big polarized frame on the front of the machine, screen will show real video.
This machine can used for advertising polarized lenses, or play other product's videos, can attract the customer's eyeballs due to the amaing effect.
Format of video could be .AVI. WMV .mp4. mkv
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