This is a tire pressure reset device, also known as a TPMS activation tool. After each tire rotation, tire replacement, or tire pressure sensor replacement, the sensor relearning procedure must be performed to ensure accurate tire pressure value acquisition and display. Operation steps: 1. Ensure the vehicle is in TPMS learning state/mode. 2. Follow the vehicle manufacturer's maintenance procedure. Hold the tool near each tire sidewall close to the valve stem in sequence (left front, right front, right rear, left rear), and press the green reset button. 3. The green LED light (TX light) will illuminate, indicating signal transmission. When the vehicle emits a beep sound, the matching process for that tire is successful. 4. Repeat the process for all tires in sequence. Once all four tires are matched, the device will flash to confirm completion. Press the red power button to turn off the device. Color: Orange Material: ABS Package Contents: 1 x Car EL-50448 II Tire Pressure Reset Activation Tool Note: Light reflection and differences in display screens may cause slight variations in the color shown in images. Measurement may vary by +/- 1-3 cm.