Atomiser copenhagen usb colour change timer copenhagen 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 hours height 10.5cm, diameter: 13.5cm, weight 0.400 comes with the user manual