4 Inch USB Fan Portable Outdoor Indoor Mini Handheld Mute Cooling Fan with On/Off SwitchFeature:Output power: 4.5 W (Max) Charger: Input: 100-240V ACOutput: 5V 1A DC Charging time: about 3 hours Working time:2-4 hoursBattery: 18650 li-ion (include)Size:110*35*155mm Package includes: 1 x Mini Fan 1 x USB Charger Cable