This is a cado humidifier. Please take a look at the official website for product details ☺︎ When you turn it on, the LED light illuminates from the bottom of the clear bottle. cado STEM 603i Model number: HM-C603i ・Cool Gray ・Instruction manual included ・2021 model ・IoT compatible (can check the air quality and operate from outside the home by linking with a smartphone with the app installed) ・No defects ・With cartridge (can be used immediately upon arrival)