Simple steps: tire valve activator All tires can be easily completed in 3 steps: Step 1 - activate the thin mode; Step 2 - Read the tire pressure sensor information; Step 3 - Read other tire pressure information in the same way. Precautions for use: Before using this tire pressure monitoring system for learning, please ensure that your vehicle is in TPMS learning mode. Keep the tool on the tire sidewall near the valve core. Press the button and press the tool on the tire sidewall at the same time until you hear the car honk Easy activation: the tool used to activate the tire pressure monitoring system is simple, fast and user-friendly, and can activate a single tpm sensor with one button. Warning: Different vehicles may take different time to complete the reset of all tire sensors. The training equipment needs 9v battery (not included). Remove the battery when not in use. Size: 5.5 * 3.5 * 13cm