Dreo's 4L Large Tank Humidifier offers continuous comfort for quiet sleep, combating congestion and dryness. With ultrasonic atomization at 28dB, it runs up to 32 hours without refilling. Its next-gen design provides a supersized mist for faster relief, releasing 5μm ultrafine mist evenly across the room. The easy top-fill design and 3-in-1 functionality make it a perfect companion for a healthier life, including aromatherapy and ambient lighting.