1. Improve air quality: The cold mist diffuser uses ultrasonic technology to create a mild environment by adding essential oils. Use it to improve the air quality in your home and protect your family from the harshness of overly dry seasons! It is suitable for living rooms, bedrooms, large rooms, lounges, nurseries, offices, etc. 2. Relaxing atmosphere: This electric diffuser is perfect for every home, office, and yoga studio, allowing you to create a serene atmosphere. The device will purify and moisturize the air, preventing your skin and lips from drying out. The diffuser will create the perfect environment for you to breathe better, sleep better, relax, and feel better than ever. 3. Long standby time: Our essential oil diffuser operates independently without the need to be connected to a power source. After a full battery charge, it can work for 2 - 8 hours, running smoothly and quietly to provide you with a quiet and comfortable environment. 4. High - quality materials: We only use the same safe and environmentally friendly plastic materials, along with state - of - the - art production technology and strict quality control. It has an automatic shut - off function when there is no water. It will automatically turn off when the water runs out, so it can be safely used overnight.