The Car Aroma Diffuser Essential Oil Scent Machine is a convenient and intelligent USB car air freshener. Made from aluminum alloy, this timing air purifier nebulizer is designed to provide a healthy environment for you and your family while driving. With a built-in microchip, this aroma diffuser can sense when the car starts and stops, making it more convenient to use. It automatically starts and stops with the car, ensuring a fragrant experience every time you drive. The fragrance concentration is adjustable, and there are five fragrance patterns to choose from. This allows you to customize the scent to your preference. Additionally, the diffuser offers deep purification to remove odors and pollution in the car, ensuring a fresh and clean environment. Please note that it is recommended to use diluted essential oils with this diffuser. Using pure essential oils may cause the mist outlet to be blocked. The Car Aroma Diffuser Essential Oil Scent Machine comes with all the necessary accessories, including an aroma machine, cotton core, USB line, non-slip mat, and user manual. Key Features: Convenient and intelligent USB car air freshener Built-in microchip senses when the car starts and stops Adjustable fragrance concentration with five fragrance patterns Deep purification to remove odors and pollution Comes with all necessary accessories