Features: 1. Compact design makes it lightweight and portable, easy to carry. 2. Know the pressure condition of the tire in the real time. 3. Universal, suitable for most car. How to use: Step 1: Enter leaning mode Set the gearshift lever to P Put the ignition switch to 'ON' Enter the interface of tire pressure display by DIC DIC shows Press Set / Ctrl to re-learn Press 'Set / Ctrl' The turn signal is lighted for 3 seconds and the horn beep sound twice to enter the learning mode Step 2: Read tire pressure sensor information Start from the front-left wheel, Make the J-46079 or Diagnostic Tool EL-50448 antenna up against the valve core position close to the rim of the tire sidewall EI-50448 tire pressure tool starts by the start switch Successful to read the tire pressure sensor information when the horn bleeps once Step 3: Same method to read other tire pressure information Follow the instruction above to read tire pressure of the front-right, rear-right, rear-left wheels. Turn signals is lighted for 3 seconds and the horn bleeps twice when the learning is complete. For certain vehicles equipped with a Tire Pressure Monitoring TPM system, a Sensor Re-Learn Procedure must be performed after tire rotations, Remote Control Door Lock Receiver Module replacement or Tire Pressure Sensor replacement. This re-learn procedure can be performed by using special tool 50448. Package List: 1 x Car Tire Pressure Monitor