Solar power + USB charging, no need to charge by connecting the car lighter Colorful, Clear LCD Digital Screen to display tire information Rear time control of pressure and temperature of 4 tires Low air pressure / high temperature alarm High temperature / leak / low battery alarm Smart shock start when the car is moving, no need to turn on/off. Wireless connection by sensors, easy installation. More stable and accurate Anti High Temperate and Cold IP67 Protection/Waterproof Battery Life:2 Years, replaceable How to replace the External Sensor battery? 1. Remove the dismantling gasket; 2. Wrench the with a wrench; 3. Remove the battery; 4. Replace a battery. Solar Charging I USB Charging I Low power consumption 1: Tire Abnormality 2: To Predict the Eak 3: Tire Pressure Prompt 4: Beep Prompt 5: Solar Charging 6: Waterproof And Dustproof 7: Four Rounds of the Same Display 8: Reduce Wear Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use. Easy to install, convenient to replace. Working Temperature:-20℃-80℃ Type:External Sensor Colour:Black Material:Plastic Package Contents: 1 x Tire Pressure Monitoring System 4 x Sensor 1 x USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.