feature: Optimize the performance of the movement, which can fill about 2 car tires at zero air pressure, or about 8 car tires when the air pressure is insufficient. Using high-precision alloy die-casting cylinder, it takes about 20 seconds to pressurize from Opsi to 150psi, which meets the high air pressure required for mountain bike air suspension and road bike tires. The digital chip air pressure sensor improves the tire pressure detection accuracy to 1psi*, and the error is smaller. Set the air pressure value according to the required pressure before inflation, and stop automatically after inflation. The pressure value can be memorized, and repeated suction does not require repeated settings. Preset 5 inflation modes to limit the default air pressure range to prevent over-inflation. Built-in lithium battery, can be inflated without external power supply, get rid of redundant power cord. The compact body only weighs about 480g*, and the shape is simple and light to travel. Put it in your bag, at home, or in your car, it's beautiful and doesn't take up space.