Perfume diffusers and ionizers are designed to help freshen the air in a car and eliminate unpleasant odors. A perfume diffuser is typically a small device that is plugged into a car’s cigarette lighter or USB port and releases a pleasant fragrance into the air. An ionizer, on the other hand, works by producing negatively charged ions that attach themselves to positively charged particles in the air, such as dust and smoke, causing them to fall to the ground and be trapped.

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