This mini essential oil diffuser is constructed of durable ABS plastic with hydrodipped wood grain accents on the lid and legs. Its compact design and USB power source, make this fun diffuser easy to transport or travel with. The tank holds 140 ml of water at the max-fill line and runs approximately 4 hours on continuous mode and about 6 hours on intermittent. Diffuser will automatically shut off when low on water. Choose from 7 different LED colors, auto-rotate all colors, or run without the light completely. For even more customization, while in the auto-rotate mode, press the "Light" button once to stop on a color shade of your liking.