Specifications BrandROCKBROSProduct NameMini Electric Air PumpMaterialNylon ShellBattery Capacity7 4V 300mAhCharging MethodType C 5V 1 5AWorking HoursAbout 200sChargeable Air Pressure100PsiSizeAbout 63 7 61 7 31 mmWeightAbout 93g Features 1 Long distance tire inflation during tire changes2 Built in pump for inflation3 Rechargeable for repeated use4 Compact size for easy portability5 Despite its small size it boasts impressive power 6 Stable battery life for worry free riding7 Simple operation to quickly inflate an empty tire in a short amount of timeWarning For TPU inner tubes with resin valves be sure to connect them with an extension air hose available for separate purchase or the valves maymelt due to overheating Note 1 During the inflation process the fuselage will gradually heat up Please pay attention when using it for a long time 2 During the inflation process please press the air cylinder to the air nozzle by hand If you hear a leak please adjust the pressing posture or angle until there is no leak 3 When the inner tube of the French mouth is inflated and the air cylinder is removed there will be a sense of pulling 4 In order to ensure your normal use please keep the battery fully charged before use Package includes 1 x Electric Pump1 x Charging Cable 1 x Waterproof Bag 1 x Seals1 x American Valve Mouth Thimble