Desk Air Conditioner features an optimized air duct design that minimizes operational noise, creating a quiet environment focused on uninterrupted work or relaxation. Car Air Conditioner includes adjustable louver grilles to direct airflow as needed, ensuring consistent, comfortable cooling without causing skin dryness during prolonged use. Portable Air Conditioner 3 functional modes-fan only, humidify only, or both combined-to targeted cooling and gentle for personalized comfort. Small Portable Air Conditioner comes with a built-in 4000mAh lithium battery, supporting USB plug-in use to free users from cable constraints for extended office or home use. Personal Cooling Fan is crafted from ABS plastic, featuring a sleek white finish that blends seamlessly with various office, home, or car interiors.