No need to stay in the heat and leave the family to sweat all night till dawn. This fan is capable of beings used even when NEPA or your Generator fails to produce power. It can be used for 4 Hours at high speed or 12 hrs. on a low speed running on battery.?This product comes with a USB port to help with your phone charging. No need to worry. We got you covered on all front.Get inspired with the low energy sapping electric Fan for your Home, Office or event center.Industry Leading Lithium ion Battery technology3 Advance speed LevelsLonger Working hoursUltra fast charging timeDischarge and overcharge protectionDC meter with high efficiency and low noise15pcs LED super bright lightAdvanced air circulation flow technologyProvides powerful natural wind cooling effects even in large roomsDual power operation(AC/DC)Adjustable HeightBattery indicatorDetachable power supply cordDC solar charging partsNo need to stay in the heat and leave the family to sweat all night till dawn. This fan is capable of beings used even when NEPA or your Generator fails to produce power. It can be used for 4 Hours at high speed or 12 hrs.