Car air compressor with fine removable manometer (PSI, BAR, KPA, KG/CM²). The digital manometer shows pressure in four units of measure: PSI, ATM, KPA, KG/CM². The removable manometer enables the operator to easily measure pressure without moving the compressor. The precision of the manometer prevents exceeding the maximum pressure allowed by the manufacturer and prolongs the life of tires and other inflatable equipment. The bright LED light enables the operator to deal with a flat tire even in poor visibility and during nighttime. Secure mounting to the wheel prevents accidental air drain and loss of efficiency.