Specifications: 1.Item Type: Car Air Pump 2.Material Type: ABS 3.Product size: 13.2*5.3*20.3cm 4.Power: 120W 5.Type: Car Tire Inflator 6.Function: for Car Tire, Bicycle, RV and Other Inflatables 7.Auto Air Compressor: Tire Inflator 12V 8.Special Feature: Digital Display Screen 9.Item Color: Black Instructions for use: 1. Insert the pin of one end of the charger into the car USB in advance, and insert the other end of the USB plug into the USB socket on the top of the pump to charge the air pump. The normal charging time is 4 hours after the first charge and until each charge is fully charged. 2. Turn on the power button, select the unit you want, and press the plus or minus button to set what you need. The value of the air pressure, after the flashing stops, press the power button to start the inflation. 3. When the inflation is completed, unscrew the air tube to complete the inflation, and be careful to connect the tire inflation connector to see if it is hot; it is normal that there will be a small amount of air leakage when the connector is unscrewed. 4. If it is judged that the tire pressure is too high, you can use the tire inflation connector to screw on the appropriate position on the valve core to deflate and reduce pressure. 5. Unscrew the tire inflation connector from the main engine, insert it into the storage slot at the bottom of the cylinder, put the cylinder away, and place it in a dry, ventilated and safe place. Notice: Can not use for SUV or Truck or Spacious Car. Package includes: 1 x Air Compressor 1 x Air hose 1 x Power cord 3 x Connectors for different applications