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 when the car is moving, no need to turn on / off Color: black Material: ABS External Sensor Easy to install, convenient to replace Dust-Proof / Water-Proof / Anti-theft Anti High Temperate and Cold IP67 Protection / Waterproof Working Temperature: -20-80 Battery Life: 2 Years, replaceable How to replace the External Sensor battery? 1. Remove the dismantling gasket; 2. Wrench the shell with a wrench; 3. Remove the battery; 4. Replace a new battery. Package Contents: 1x Tire Pressure Monitoring System 4x External Sensor 1x 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.