Cordless Portable Design: Our cordless tire inflator has a compact appearance, light weight and ergonomic design, can be held with one hand and is easy to use. Built in a large capacity 2 * 3500mah rechargeable battery, eliminate the slavery of long wires. It can be fully charged in 3 - 4 hours and can be used for 20 - 30 minutes. It can inflate tires at anytime and anywhere, making tire inflation more convenient.Note: The red light on the USB cable will light up while charging, and there is no indication on the tire inflator. Once fully charged, the red light will turn green. Fast Inflation and Automatic Shut-Off: Our car tire pump provides 150PSI powerful pressure and can fully inflate a standard mid-size car tire in 3-5 minutes. The tire inflator air compressor will automatically shut off when the preset pressure is reached, so you don't have to watch the tire pressure gauge all the time, freeing your hands and making inflation easier. Pure Copper Motor & Fast Heat Dissipation: The digital tire inflator is upgraded to a thicker pure copper coil, which is faster and has better heat dissipation, so you don't have to worry about overheating anymore. Our tire pump housings are made of high-quality ABS materials and are shock-resistant, sturdy and durable. The inflatable hose is made of braided material high-strength nylon, not only antifreeze and explosion-proof, but also resistant to high temperatures. Intelligent Digital Display and Accurate Pressure Measurement: The electric bicycle pump is equipped with a high-definition LCD screen, which can clearly display information such as tire pressure, battery level, etc. Connect the air pump to the tire valve and press the r button to quickly and accurately display the current tire pressure.