Preowned GREAT Condition Works perfectly! Wonderful smells Changes color Auto shut off Light-changing aromatherapy diffuser uses Ultrasonic waves to instantly vaporize water and essential oil to produce a cool, fragrant mist.(oils NOT included) 3.5 × 10-inches with 80ml capacity; run time: 3 - 6 hours with auto shut-off at low water level. LED color-changing light or set light for sleep mode (mist and light controlled independently)