DOXINGYE Solar Power Digital Car TPMS Tire Preure Monitoring System LCD Display Car Tire Preure Sensor Auto Security AlarmSpecifications and functions:-Solar power charging, don't need to charge by connecting car cigarette lighter-Colorful LCD Digital displaying, clear to show tire information-Rear-time monitoring preure & temperature of 4 tires-Low air preure/high temperature alarm-High Temperature / Leakage / Low Battery Alarm-Intelligent Shock Boot when car moving, don't need to turn on/off-Wirele connect by sensors, easy installBuild-in sensors and external sensors options, meets all your need-Freescale chip sensors and fit on almost 98% cars on marketBuild-in Sensor (Optional):-Please install in by Profeional car center-More stable and accurate-Anti High Temperate and Cold-IP67 Protection / Waterproof-Working Temperature: -40-125-Air preure setting range: 0.1~6.0BA-Frequency: 433.92MHz20.00MHZ-Battery Life: 5 YearsExternal Sensor (Optional):-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, replaceableHow 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.