Essential Oil Diffuser, Wood Grain Ultrasonic Cool Mist Humidifier with Low Water Protection, Timer Settings and Color LED Lights Changing for Home, Yoga, Office, Spa, Bedroom. Smooth Wood Grain Design: Whether it is at work or in the coziness of your home, this unique humidifier coated with smooth wood grain will make it a perfect addition to any kind of decoration. Just relax yourself by simply looking at it and ease stress at the rhythm of colorful changing LED. Whisper-Quiet Operation: With the adopted ultrasonic technology, this diffuser is extremely quiet without annoying noises which disturb you when you sleep or at work. It can give out ultra fine and smooth mist to moisten your skin and help you breathe better when you are sleeping. Auto Shut-off Function: This aroma diffuser comes with a built-in safeguard that will automatically power off for safety insurance when the water level is low. That means you will be able to turn it on at bed time and enjoy purified air during your sleep with peace of mind.