The 12" rechargeable fan works above 12 hours without power, enjoy a night of sleep with fresh air, no more complains about heat. You can use this fan indoor and outdoor as the occasion requires. It is made of durable materials, this will ensure that it last long and you get value for your money. The Lontor rechargeable fan is very affordable, energy efficient and it operates quietly, even at high speed. This fan is a must have for everyone. inchesFeatures With USB output/With night light/With timer function/AC-DC powerBattery TypeLead-acid BatteryBattery Capacity 6V 4500mAhCharging Time 12-14H by AC powersolar Charging Time DC 12V 3W: 24-28HSpeed Option1-3 Operating Time1. Fan in high speed: 4H2. Fan in medium speed: 11H3. Fan in low speed: 32H4. LED light: 50H