Super Long Time for diffusing the oil can last above 48 hours for add water once diffuse the essential oil with the flowing waterhumidify the dry air a little and will not add too much moisture to the airadding ambiance to your living room, office, bedroom, or anywhere you need to add a relaxing touch. the flowing water can add some negative ion and energy to the environment7 changing colors lights The night light create a relaxing & comfortable atmosphere that is good for sleepthe product is made with BPA free and food grade materialcan work seperately without connecting to the power. When the battery is fully charged, it can work for more than 15 hours. Produced by Baiming Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''''''''t hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it