Mini Folding Fan Rechargeable Rechargeable BatteryEasy Fold-able DesignPowered By BatteryCompact size of regulatorDurable and Long-lasting UsageStandard regulator seriesinput voltage : 5vinput Current : 0.5-1Aoutput voltage :5-9voutput power : 3wBattery : Rechargeable 18650 -3.7VBox,usb Charger..