Specifications: Product Dimensions: 7.2 × 8.1 × 11.6 in / 18.3 × 20.6 × 29.4 cm Product Weight: 3 lb / 1.38 kg Whisper-Quiet Operation: ≤ 28dB Effective Range: 107-290 ft² / 10-27 m² Material: BPA free, suitable for babies and adults Features: √ Large Water Tank of 3L √ Operation that Lasts Up to 25 Hours, 3 Nights of Sleep √ Essential Oil Diffsuer √ Ultra-Quiet Operation √ Knob-Control √ 360 Rotating Nozzle √ ETL Certified For Safety and Reliability √ Comes with Cleaning Brush HUMIDIFY DRY AIR IN MINUTES: The Dual 150’s 3-liter (0.79-gallon) tank can run for up to 25 hours, helping you combat congestion, coughing, and dry skin. Unlike other humidifiers that leak and rattle, this is the cool mist humidifier you keep. REFILLING IS A BREEZE: Tired of flipping over your tank and spilling water? This game-changing top-fill humidifier can last for 3 nights, making it the perfect humidifier for bedrooms, baby, large rooms, plants, nurseries, and offices. CONVENIENT KNOB & NOZZLE: Simply use one knob to control mist output and turn the 360° nozzle to direct mist in any direction GOOD SLEEP MATTERS: No more loud humming or gurgling. Enjoy a quiet night’s rest while the Dual 150 humidifies your bedroom at a whisper-quiet 28dB level, helping you sleep without a stuffy nose or dry throat. ALWAYS CARE ABOUT YOU: With BPA-free materials and an auto shut-off feature, the Dual 150 comes first when buying a humidifier for baby.