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2-5. Precautions

1. Ensure that the unit is installed indoors in a completely dust-proof box.
2. Should the unit be compelled to be installed outdoors, house it in a completely dust- and rain-proof box not exposed to direct sunlight.
3. For proper performance, the unit must be held in a working temperature range of -10 to +40 degrees C.
4. The usable years of the unit is ten years.