1、3‑200PSI digital tire inflator, accuracy is within ±1 PSI, support switchable 4 units( PSI/KPA/Bar/Kgf/cm^2), can be used to test things from bicycles to heavy trucks. 2、Digital tire pressure gauge can display the test value of 2‑3s for easy reading, with backlight function, can be read clearly even in the dark. Automatically switch off to save battery power if there is no operation within 15s. 3、Support deflate and inflate function, side bleed valve helps to vent the air when there gets high pressure, when the air pressure is too low, just connect the air compressor and press the "inflate" button to start inflating the tires. 4、The design of the double‑head chuck make it easier to connect the tire valve. It helps extend tire life and improve fuel economy, reduce the burden on the vehicle and allows you enjoy a comfortable and smooth driving. 5、With on/off key, when the air pressure enters, it automatically recognizes the air pressure and turns it on without manual operation. Suitable for motorcycles, cars, midi and mini coaches, trucks,etc.