Helsinki Atomiser uses Ultrasonic waves to instantly vaporize water and essential oil in the tank, to produce a cool, dry fragrant mist.- Tank Capacity 120ml- LED light - 4 colours- Powered bu USB ( length of the cord 100cm)- Auto power off when water runs out- timer 1-3-6 hoursHeight 10.5cm, Diameter: 13.5cm, Weight 0.400 Comes with the user manual