40S FAST INFLATION: ATKMAYI cordless tire inflator can inflate tires quickly with a maximum pressure of 150 PSI and airflow of 35L/Min. In just 40 seconds, the pump can inflate a tire from 30 to 36 PSI. It's perfect for inflating cars, motorcycles, bikes, balls, and other inflatables. | 5 INFLATION MODELS: The portable air compressor has 4 types of pressure units: PSI, KPA, BAR, and KG/CM ². There are 4 preset inflation modes: bicycle, motorcycle, car, and ball. The custom mode can also set pressure values based on the inflation object to meet various needs. It is an essential product for daily life and travel. | ACCURATE LCD SCREEN & AUTO STOP: The air pump is equipped with an upgraded high-precision chip that increases tire pressure detection accuracy to ±0.5 PSI. The large LCD shows real-time pressure values for easy observation and operation. The pump automatically shuts off when reaching the preset value to prevent overinflating. | DUAL POWER SUPPLY: The portable tire inflator has a dual power supply to switch between cordless and electric inflation anytime. The electric air pump has a built-in rechargeable 20000mAh battery and can inflate the automotive directly after a full charge. You don't need to worry if the battery runs out on the road because the portable air compressor has a 12V DC power cord for Road Rescue emergencies. | MULTIPURPOSE TIRE INFLATOR: This air pump for car tires can be used as a portable air compressor to inflate tires and is equipped with an LED light to illuminate and send out an SOS alarm at night. A 5V/2A USB output port on the top of the product can power mobile phones or other electronic devices and act as an emergency power supply.