JF TECH JRC-27F, Руководство пользователя

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3. Avoid placing the device in direct sunlight place, or poorly ventilated location, or near a
heat source such as a heater or heating, etc. (ignore this may cause a fire hazard).
4. In order to avoid damage to the DVR, do not have the DVR set up in smoke or steam, the
temperature is too high or there is a lot of dust in the workplace.
5. When cleaning, use a soft cloth to wipe off the dirt on the housing. When cleaning up
dirt, dry cloth should be cleaned when the dirt is hard to remove, use neutral detergent
gently wipe clean, do not use alkaline detergents. If there is sticky dust on the lens, use
a special lens paper wipes.