SELECTABLE BUTTONS: In the lower part of the enclosure there are two buttons to allow the choice of timer and colors. The steam output can be selected between continuous or timed mode (/ 30 min / 60 min / 90 mins),while the operation of the LED light of 7 different colors can be selected between alternating long or short duration coloring, fixed lighting or total extinction of the light. The ultrasonic technology will allow the essential oil to combine more easily with the steam and create a relaxing atmosphere. Just add essential oil to purify the air, improve mood and relieve stress. CAPACITY: 145ml water tank, enough to use the product all night long. Once the water inside runs out, it automatically turns off with a signal, increasing safety and energy efficiency. FASHIONABLE DESIGN: The essential shape combined with the play of colors makes it a perfect piece of furniture to diffuse the essence and give the room a luminous touch. HOW TO WORK: The essence diffuser works with a USB cable making it perfect for any occasion and can be taken to the gym and the office, just connect it to the USB socket of the PC or to a wall adapter withUSB socket. USB essence diffuser with ultrasonic technology, usable with essential oils. Perfect for bringing a touch of freshness and color to every room, thanks to its LED light with 7 interchangeable colors, which can also be usedwithout fog function. 4 timer settings available: continuous use / 30 mins / 60 mins / 90 mins. Automatic shut-off when water runs out, USB cable included.