This fan is built-in device with free maintenance and environmental Lead-Acid Battery with high capacity to 4000mAH. The fan speed can be adjusted to high/medium/low speed. The fordable nature of the fan helps to save space. After full charge, the high speed can work 6 hours, medium 5 hours and low speed at hours. It also comes with overcharge protection function. It can be powered both by AC or DC, the DC input can be charged by adapter or solar panelBuilt-in device free maintenance and environmental Lead-Acid Battery with high capacity to 4000mAHAdjustable setting: High/medium/low speed, free to choose comfortable wind.Affordable fan, saves space.After full charge, the high speed can work 3.5 hours, medium 5 hours ans low 6.5 hoursOvercharge protection functionCan be powered both by AC or DCDC input can be charged by adapter or solar panelEnergy saving multi-functional fan and LightingEquipped with LED night lamp functionStrong light lighting can work up to hoursUSB output function to charge to charge digital productsDC/AC inputThis fan is built-in device with free maintenance and environmental Lead-Acid Battery with high capacity to 4000mAH. The fan speed can be adjusted to high/medium/low speed. The fordable nature of the fan helps to save space. After full charge, the high speed can work 6 hours, medium 5 hours and low speed at hours. It also comes with overcharge protection function. It can be powered both by AC or DC, the DC input can be charged by adapter or solar panelBuilt-in device free maintenance and environmental Lead-Acid Battery with high capacity to 4000mAHAdjustable setting: High/medium/low speed, free to choose comfortable wind.Affordable fan, saves space.After full charge, the high speed can work 3.5 hours, medium 5 hours ans low 6.5 hoursOvercharge protection functionCan be powered both by AC or DCDC input can be charged by adapter or solar panelEnergy saving multi-functional fan and LightingEquipped with LED night lamp functionStrong light lighting can work up to hoursUSB output function to charge to charge digital productsDC/AC inputThis fan is built-in device with free maintenance and environmental Lead-Acid Battery with high capacity to 4000mAH. The fan speed can be adjusted to high/medium/low speed. The fordable nature of the fan helps to save space. After full charge, the high speed can work 6 hours, medium 5 hours and low speed at hours. It also comes with overcharge protection function. It can be powered both by AC or DC, the DC input can be charged by adapter or solar panelBuilt-in device free maintenance and environmental Lead-Acid Battery with high capacity to 4000mAHAdjustable setting: High/medium/low speed, free to choose comfortable wind.Affordable fan, saves space.After full charge, the high speed can work 3.5 hours, medium 5 hours ans low 6.5 hoursOvercharge protection functionCan be powered both by AC or DCDC input can be charged by adapter or solar panelEnergy saving multi-functional fan and LightingEquipped with LED night lamp functionStrong light lighting can work up to hoursUSB output function to charge to charge digital productsDC/AC inputThis fan is built-in device with free maintenance and environmental Lead-Acid Battery with high capacity to 4000mAH. The fan speed can be adjusted to high/medium/low speed. The fordable nature of the fan helps to save space. After full charge, the high speed can work 6 hours, medium 5 hours and low speed at hours. It also comes with overcharge protection function. It can be powered both byAC OR DC,th DC  input can be charged by adapter or solar panelBuilt-in device free maintenance and environmental Lead-Acid Battery with high capacity to 40mahAdjustable setting: High/medium/low speed, free to choose comfortable wind.Affordable fan, saves space.After full charge, the high speed can work 3.5 hours, medium 5 hours ans low 6.5 hoursOvercharge protection functionCan be powered both by AC or DCDC input can be charged by adapter or solar panelEnergy saving multi-functional fan and LightingEquipped with LED night lamp functionStrong light lighting can work up to hoursUSB output function to charge to charge digital productsDC/AC input