(1).16 inches Both AC & DC power Emergency Fan; (2).Rechargeable free maintenance Lead-acid battery 12V,17Ah Specification ModelLW-12BatteryFree Maintenance Lead-acid battery 1×12V,17AhRateAC110V-240V ,50-60HZPower55WDurationHigh : 9H , Middle : 10H , Low : 11HCharge Time12H-15HMotorBrushless MotorTimer7.5HType16 inches Both AC & DC power fan Oscillation FunctionYesCharge IndicationYesOver Charge ...