【Ultrasonic Diffuser 】: VIVITEST is a company with more than 18 years in the development,design,production and research of aromatherapy diffusers,Water molecules are decomposed into 0.1-5 micron diameter nano scale cold fog,By high frequency electronic oscillation generated by ultrasonic vibration equipmentallowing the aroma to float in the air,Produce a lot of active oxygen anion. | 【Waterless Auto-Off Function】:Electric aromatherapy diffusers can last for 2-4-6 hours.Designed with waterless auto-off function,This essential oil diffuser will turn off automatically. | 【Handmade Ceramic diffuser】:Hand Crafted ceramic cover,Air dry naturally,The Ceramic diffuser was sprayed with a layer of coarse sand,Easy to clean,Solid and durable and save space. | 【Silent Operation】:Whisper-quiet operation(≤19dB), Soothing your mood, Relieving stress and Promote Sleep,The essential oil diffuser operates extremely quietly. | 【9 Colors Can Be Adjusted &4 Timer 】Create a relaxing,warm, loving,fragrance environment.We promise One-year warranty,Contact us After-sales Email.