Name: Mini Air Compressor Material: plastic, metal Maintain correct tire pressure Maximum flux: 25L/Min Suitable for universal cars tires Power: DC12V 10A Inflates ordinary car tire about 5 minutes(>30PSI) Powered by cigarette lighter / DC 12V Usage: ①Take out the cigarette plug, insert to the car cigarette lighter. ②Open the air pump switch and plug the air tap in tire valves directly. It means air flows after hearing the sound of the air emission by tires, at this time can tight the air tap and then inflate, the air won’t leak. ③The instrument pointer will rise according to the tire saturation level. When reaches the proper tire pressure (normally is 223kpa=35PSI), remove the plug and air tap and inflate complete. Precautions: Please start the car engine first to enhance electricity, don't consume car battery power This item is limited to use with DC power supply (DC12V12A), do not use high voltage power supply When inflating, please continuous work for 10 minutes for cooling the rest, this can prolong the life span. It can continuous work for 30min if inflate for rubber dinghy Normally it will reach 220KPA after 3-6 min’s inflation, it need more time for big tires. If the instrument pointer rise rapidly at the beginning, it means the air didn’t inflated into tire, you need to restart, or the instrument and motor will get damage Please don't leave this item when inflating, you need to pay attention to the tire pressure all the time, it can’t be supersaturated Please make sure that cigarette lighter electricity well Avoid moisture, fall down and sand invasion, avoid children to play with If appears downtime phenomenon when using, it’s because of the cigarette lighter doesn’t have enough power supply current, we have tested this item before shipping and make sure its current is more than 12A.