Experience 3-in-1 cooling with Evapolar evaSmart. This unit cools and humidifies the air through evaporative technology. It features a removable water tank and LED light. Operate it via mobile app or connect it to smart home services. Ideal for personal cooling in spaces like cars, desks, or tents. Efficient Personal Cooling: Cool your immediate surroundings using evaporative technology, suitable for hot, dry environments. Enjoy a cool breeze within 3 - 5 feet. The cooling effect results from water evaporation. Energy Efficiency: Consuming only 12.5W, it helps save on energy costs. It can work alone or alongside an AC to reduce energy usage and prevent air dryness. Most effective in humidity below 70%. Breathing Safety: Our patented Evabreeze technology efficiently cools and humidifies using durable basalt fibers. Please note the cartridge may range in color. Basalt dust inside is normal. Portability: EvaSmart coolers are portable and can be powered via USB from power banks, laptops, or car power outlets of at least 2.5A 5V. Easy to move, providing a refreshing breeze whether you're traveling, working, or relaxing at home.