1.Adopt OLED high-definition display, still clear view under the strong outdoor light;2.Powered by 1 No.5 battery, low power consumption, high efficiency, continuous 40 hours without power;3.One key to start using, simple operation, get rid of cumbersome settings;4.Disposable air nozzle design, clean and hygienic; 5.Ergonomic design, comfortable to hold, does not take up space.