The most comfortable indoor humidity is between 30-50 Percent , so if you're suffering from dry air, then you'll definitely benefit from a humidifier. Cool mist into the air that helps open up your airways and keep your sinuses, eyes, skin and more hydrated all day and night. It is suitable for bedroom, living room, office, nursery or housplants. With the special BPA Free material, this cool mist humidifier is safe for baby nursery. Keep air fresh, enjoy your healthy life, a humidifier is what you need. Special Features: (1) 75 Hours Runtime: around 3 days at low mist level (2) 4.5L Large Capacity: works well in a large room 40m²/430ft² (3) 26dB Whisper-Quiet: no dripping noise, sleep more peaceful (4) BPA Free Material: safe & healthy for baby nursery or pregnant moms (5) 270 Degree Dial Nob: adjust the mist level as your will (6) Smart LED Light: indicator light will turn to red for waterless reminding (7) 360 Degree Rotating Nozzle: evently output the mist to every corner (8) 25.6in High Mist: high mist evaporate quickly, won't wet your desk Friendly Tips: 1. Don't add any essential oils into the humidifier. 2. Don't remove the water tank frequently when the humidifier is on working. 3. Sliced lemon or white vinegar could do a help for cleaning. 4. Screw the tank cap tightently after water full filled.