10-speed rotary knob: stepless speed control, fine control of wind power, easy to use, the indicator light will slowly light up when starting to meet the needs of different environments and different members. Quiet fan: low noise design, soft wind feeling, wind saturation, dry heat dispersion, brushless motor, strong power, long life, regularly drive the fan blade to work, just the right amount of wind pressure, bringing you a constant source of coolness. 90° automatic head shaking: 60° fixed angle up and down, automatically return to position when shutting down, multi-angle air supply, DC wind, driving away dry heat, gentle wind does not blow directly, natural wind without dead ends, cool companion. Easy to clean: removable design, rotate counterclockwise to open the front cover (before removing it, please unplug the power and turn off the fan), use alcohol to wipe the fan. Built-in 2000mAH battery: 7 fan blade design, low noise, precise cutting airflow, delicate cutting, uniform