Simple and fashionable design style, with simple and clear black and white as the main, with a transparent outer cover, forming a sharp contrast, and embellished by three-color lights, highlighting the sense of science and technology of the product, the overall shape is simple and refreshing, and the parting line is taken as a part of the shape to make the product more overall. It conforms to the appearance design used by fashionable men, women and students, analyzes the usage habits of business travelers, amplifies the indicator light at work into atmosphere light, so that users can notice the cleaning situation at a distance, and simplifies the operation panel to reduce the learning cost.