Model no: DP7627 Battery voltage: 3.7V Input: 5V— 1A Battery capacity: 4000mAh lithium battery Using time: 3/2/1 hours (Strong wind/middle wind/weak wind) Effective wind speed: 4.5m/s Working mode: It can use USB or 18650 Lighting source power: 0.6W Rated power: 5.5W Charging timer: 6 hours