AIRFIRE 4L Cool Mist Humidifier with Auto Humidity Control and Timer for Large Room, Essential Oil Diffuser Air Humidifiers for Bedroom, Overnight Use, Quiet Run, Night Light, White

<h4><strong>Breathe Deep, Sleep Deeper: The 4L Humidifier That Does It All</strong></h4> <p>Tired of dry air ruining your sleep and skin? Meet your all-in-one wellness upgrade. Our 4L Ultrasonic Humidifiers instantly adds moisture to dry air in large rooms (up to 538 sq ft), while doubling as a calming essential oil diffuser and soft-glow night light. It’s the effortless solution for restful sleep, easier breathing, and a perfectly balanced home—set your comfort and forget it.</p> <p>&nbsp;</p> <p>🕐 36-Hour Marathon Runtime: 4L tank runs for a day and a half on low, so you sleep through the night without refills.</p> <p>🤖 Set It &amp; Forget It Smart Control: Digital display lets you set your exact humidity (40%-90%). It auto-adjusts to maintain it, no guessing needed.</p> <p>🌿 3-in-1 Wellness Powerhouse: Humidify dry air, diffuse soothing essential oils (like lavender for sleep), and choose from 7 calming night light colors—all in one sleek device.</p> <p>🤫 Library-Quiet &amp; Effortless: Runs below 28dB (quieter than a whisper) with a super easy top-fill design. Just pour water in—no messy disassembly.</p> <p>&nbsp;</p> <ul class="ybc-ul-component"> <li class="ybc-li-component ybc-li-component_ul"> <p><strong>For Your Best Sleep Ever:</strong> The optional night light and whisper-quiet operation create the perfect nursery or bedroom oasis. Relieves dry cough, congested sinuses, and cracked skin by morning.</p> </li> <li class="ybc-li-component ybc-li-component_ul"> <p><strong>For Focus &amp; Comfort at Work:</strong> Keep your home office or living room air optimally humid. Reduces static shock, protects wood floors/furniture, and helps you stay focused.</p> </li> <li class="ybc-li-component ybc-li-component_ul"> <p><strong>For Your Self-Care Moments:</strong> Add a few drops of eucalyptus when you’re stuffy, or lavender for stress relief.&nbsp;</p> </li> </ul> <p>&nbsp;</p> <p>&nbsp;</p>

• 🌊 4L Large Capacity Humidifier with 36-Hour Runtime – The AIRFIRE YH-921 air humidifier provides ultra-long moisture for up to 538 sq ft spaces. Enjoy all-night and all-day comfort without constant refilling.
• 🤖Smart Humidity Sensor with Digital Control – Set Your Perfect Air – Choose from 40% to 90% humidity. The built-in sensor automatically maintains your setting, preventing over-humidification.
• 💨 5 Adjustable Mist Levels + 360° Nozzle – Customize mist output (Low/Med/High) and direct the fine cool mist exactly where you need it with the rotating nozzle.
• ✨ 3-in-1: Humidifier, Essential Oil Diffuser & Humidifier with Color Night Light – A wellness trifecta. Relieve dryness, disperse therapeutic scents with the dedicated tray, and pick from 7 soothing LED colors for ambiance.
• ⏰ 4 Custom Timer Options (1H/2H/4H/8H) – Program it to shut off automatically. Perfect for saving energy or running only while you sleep or are in the room.
• 🔇Quiet Humidifier for Baby & Easy Top Fill – Runs quieter than a library whisper. Refilling is a breeze—just open the top and pour water directly into the wide opening, no tools or flipping needed.
• 👀 Clear View Tank & Humidifier Auto Shut Off – The semi-transparent tank lets you check water levels at a glance. It safely turns off when empty, giving you total peace of mind.
• 🏠Perfect Humidifier for Bedroom, Office, Nursery & More – Fights dry air in any medium to large room. Ideal for improving sleep, relieving allergy/flu symptoms, protecting plants, and reducing static.