Stay Chill, Stay Fresh! ❄️ With a generous 5L water tank, this cooler operates for up to 24 hours, keeping you refreshed all day. Equipped with wheels for easy mobility, take your comfort wherever you need it. Enjoy a peaceful environment with a maximum sound level of just 50 dB, perfect for work or sleep. Experience the ultimate 4-in-1 air solution that cools, humidifies, purifies, and circulates air. Detachable filters trap dust, pollen, and pet hair, ensuring you breathe clean, fresh air. 5L Water Tank 5.5 m/s Wind Speed 4-in-1 Functionality The SONBION Evaporative Air Cooler is a versatile 4-in-1 device that functions as an air cooler, humidifier, fan, and air purifier. Designed for modern living, it features a powerful 5.5 m/s wind speed, a large 5L water tank for extended use, and advanced filtration to ensure clean air. With its portable design and whisper-quiet operation, it's perfect for any home or office setting.