1The wireless design and compact size of the tire inflator, make it easy to carry and can be used with one hand. 2Wide range of applications, suitable for cars, bicycles, balls, toys, fast inflation. 3With LED light, you can see it even at night. 4Wonderful bike accessory for outdoor cycling. 52 different colors for you to choose, meet your different needs. Item type:ElectricBicycleTireInflatorMaterial: plasticWeight: Approx. 511gVoltage: input DC5V and work DC12VBattery capacity: 2000mAH (500mAH x 4)Battery type: lithium batteryInflation pressure: 120PS|( PSI/BAR/KPA/KG/CM)Charging time: 5V/1A 3 hours 5V2A 2 hoursLength of outer air tube: Approx. 160mm/6.3inWorking temperature: -20~60Steps:1. Connect the hose to the bottom tire valve core and fasten it.2 Press the power button for 2 seconds to turn on the product to wake up the LCD screen.3 Press the "U" button to select the unit, buttons "+" and "-" to preset the tire pressure.4. Press the power button to start inflation, and it will automatically stop when the preset pressure is reached.Do you have the following concernsWill car tire pressure be lost over time?Does tire pressure change with temperature?Does your bike or motorcycle need extra pressure?Do you need to put extra pressure on mattresses/airplanes/toys/sports balls/inflatable products?This cordless portable pump can help you. 1 x Air pump1 x Charging cable1 x Instruction1 x Outer air tube1 x Storage bag4 x Air nozzle