![background image](http://html1.mh-extra.com/html/major-tech/mt173/mt173_user-manual_696849012.webp)
•Short press the panel button "+" to plus illuminance level up to a
maximum illumination for 5, when the level is 5, the LED is at its
brightest.
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12
Video Borescope User Manual
Regulating light Illumination
•Light illumination default as 3.
•Short press the panel button "-" to lower illuminance level 1, the
lowest illumination for 0, when the level is 0, the LED will not light.
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