Thank you for viewing. This is a humidifier I used previously. It can be used as a smart appliance with app integration. The black part where the water is stored is slightly peeling. Please see photo 6 for details. Since this is a used item, please refrain from purchasing if you are sensitive to the product condition. If you have any questions, please feel free to contact me. Below is a brief description from yesterday. Levoit Smart Ultrasonic Cool Mist Humidifier Set a timer when you go out or before going to bed. Set the optimal humidity for yourself in auto mode, and automatically turn it ON/OFF, adjust the mist, etc. For long-term use, auto mode is recommended to prevent excessive humidification. Smart compatibility allows you to easily control the humidification amount, operating mode switching, timer settings, etc. with your smartphone. Equipped with a 4L large-capacity water tank, it can continuously humidify for up to 40 hours. Humidification capacity: 300ml/h. Operation is also possible from the app. App name: VeSync Quiet operation at 24dB.