️【AUTO ON and OFF】 - Ir floodlight for camera built-in with photocell sensor, the IR illuminator auto switch on at dusk and switch off at dawn, energy saving and secure long lifespan. Wave length ...
Infrared radiation (IR), or infrared light, is a type of radiant energy that's invisible to human eyes but that we can feel as heat. All objects in the universe emit some level of IR radiation, but ...
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