Homdox Essential Oil Diffuser Mini Air Purifier with 7 Color Changing LED Light Deep Brown,Ideal for use in the office, decoration and sterilization More Gurantee :Homdox is a registered brand who promise 100% refund without any hesitation if the aroma diffuser couldn't meet request More Comfortable:Aromatherapy oil diffuser fully absorb every hydrated plant essential oil nutrient, enjoy wonderful aromas Ideal for use in the office, decoration and sterilization More Intelligent:Soundless Design, no-heat ultrasonic technology delivers safet,Large 500ml water capacity that can continue use up to 10 hours each time.turn off automatically 5 in 1 Functions: Aromatherapy Diffuser, Humidifier, Air Purifier, Ionizer, Night Light. 4 Timer Settings: 60 minutes, 120 minutes, 180 minutes,PLEASE clean it at least once a week More Safe:Homdox Ultrasonic Diffusing technology breaks water and essential oils into extremely fine micro-particles without using heat (heat alters and destroys the properties of essential oils)