Quiet Desk FanA small fan that is softer than the sound of breathingSofter than the sound of breathing, the noise level of the personal fan is 30 dB to 50 dB below the sound of breathing in the lowest and highest air speed modes, respectively. You can enjoy the coolness without being disturbed by the noise of the fan.Oscillating FanStart the USB desk fan power, press the S button fan automatically oscillates 120 left and right. Blow the cool air to a wider space, you can manually adjust the wind direction up and down 90 to realize multi-angle air delivery and keep cool at all times.4 Levels of Adjustable Wind SpeedThe desk fan has 4 wind speeds to choose from: Gentle, Comfort, Fresh and Strong, you can press the button on the base to change the wind speed level according to your needs. Battery capacity is also displayed during operation4000 mAh USB FanDesktop USB fan can be easily charged by connecting to mobile power, laptop. A full charge lasts for 3-12 hours (depending on wind speed). The personal fan with built-in 4000mAh battery keeps the cool breeze with you all day long. Just connect the USB and the desk fan keeps running. Power can be supplied via Micro USB or Type-C USB.Safety Grille, Removable for CleaningWith high-density ABS grille, it protects children and pets more effectively. Unscrew the grille screw of the personal fan and turn it to the left to remove the front cover to clean the blades. Portable Small FanPortable personal fan is small in shape, made of high quality material, unique and fashionable design, suitable for indoor and outdoor use. Bring you coolness at any time, suitable for living room, bedroom, office, library, RV travel, camping and other places.