Rechargeable Air Pump YH-760 (Using lithium-ion battery 2600mAh).Economical with the use of rechargeable batteries.With automatic strength switching that makes the battery last longer and prolongs fish activation.Easy charging with micro USB connector charging.With a battery dead (advance) notification display and automatic weak switching function.[Blast volume] Strong: 6 hours, about 1.5 L/min.Weak: 24 hours, about 0.7 L/minAuto: About 12 hours, about 1.5-0.7 L/min.[Charging time] 8 hours.Marker function.Washable type