Car Diffuser Humidifier with Colorful Lights, Auto Shut-Off, 2 Mist Modes, for Essential Oils Scent Fresh Recommended Uses For Product Office, Vehicle Material Acrylic About this item Large Capacity & Auto Shut-Off - This car diffuser has a large 260ml container and two spray modes: 4-hour continuous mist and 8-hour intermittent mist. It shuts down when the water level is low. Mini Diffuser & USB Powered - Small design, easy to carry anywhere. USB power supply is compatible with any device's USB port, and can be used in bedrooms, offices, and cars.