Whisper Quiet and Cool Mist - Atomizes pure water and essential oil into an ultra-fine mist through ultrasonic atomization technology. The aroma of essential oil floats in the air, creating a 25dB quiet atmosphere for a calm and comfortable sleeping night. This aroma diffuser can greatly improve your work and study efficiency. 4 Timer and 7 Colour Light - This aromatherapy diffuser features 4 time setting modes: stable, 1 hour, 3 hours, or 5 hours. The 7-color light can be adjusted between a gradual cycle mode and a one-color fixed mode to suit your preferences. The essential oil humidifier can also be used as a night light to help you sleep better. Home Decor and Gift Idea - Features a unique retro metal design that blends well with your furniture, serving as a nice table decoration. Salking aromatherapy essential oil diffusers also make thoughtful and handy gifts for women. Essential oil diffusers are the newest trend. BPA-Free and Waterless Auto-Off - The SALKING ultrasonic diffuser is made of eco-friendly PP materials, which is BPA-free. The SALKING humidifier will automatically shut off when it is waterless, adding to safety and energy efficiency. Oil diffusers are safe enough to be used by elderly people without worry about them forgetting to turn it off. Looking Forward to Your Advice - The air mist diffuser holds 260ml of water and refreshes rooms of 30-45m². Immerse yourself in aromatherapy. If you have any questions about the aroma diffuser, you can email us or leave a message in Q&A. We look forward to your letters and suggestions to help us improve.