Super Wind Speed Super SilentThis battery powered fan uses threephase permanent magnet outer rotor brushless DC motor so that its variable speed will be smoother and the motor will run with less noise. Unlike other noisy shaky fans on the market our battery operated fans portable not only provide a maximum airflow of cfm but also only 45 decibels of noise. The battery fans portable rechargeable is quiet enough to be used for indoor sleeping yoga and other indoor activities.Humanized DesignThe outdoor fan has 12 levels of adjustable wind speed. Equipped with LED battery life indicator and wind speed level display to indicate the remaining power and remind you to charge the fan in time. With USB port it can charge cell phones and other digital products perfect for outdoor emergency use. The portable fans 120 adjustable tilt design helps direct air precisely to where it is most needed for cooling.Long Standby TimeThe rechargeable fan portable has a builtin 1mAh highcapacity lithiumion battery. Adapter charging time 23 hours solar charging time 36 hours. This camping fan can run at high speed for about 4 hours and at the lowest fan speed setting for up to 24 hours of continuous operation. This battery operated fan will keep you cool all day long. Our product will be a good choice for an outdoor solar fan that you can use for a long time.Excellent Quality and Good AfterSales ServiceThis solar fans for outside has a sturdy metal structure large carrying handle and nonslip rubber feet which can operate properly in various environments. Easy to assemble no tools required super durable. Wireless portable fan is perfect for barbecue camping fishing outdoor sports travel work etc. If you have any questions about your fan please contact us we promise to give you a satisfactory solution. No risk order now!