This is a tire pressure reset device, also known as a TPMS activation tool. After tire rotation, replacement of tires, wheel sensors, or the body control module, the sensor relearn procedure must be performed to ensure accurate tire pressure value acquisition and display. Operation steps: 1. Ensure the vehicle is in TPMS learning mode. 2. Follow the vehicle manufacturer’s maintenance procedure. Position the tool sequentially at each tire (left front, right front, right rear, left rear), aligning it with the tire sidewall near the valve stem. Press the green reset button. 3. The green LED (TX light) will illuminate, indicating signal transmission. When the vehicle emits a beep, the matching process for that tire is successful. 4. Repeat the process for all remaining tires. Once all four tires are matched, the device will flash to confirm completion. Turn off the power using the red power button. Color: Orange Material: ABS Package Contents: 1 x Car EL-50448 II Tire Pressure Reset Activation Tool Note: Light reflection and screen settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.