Specifications and functions Supportsolar power charging, dont need to charge by connecting car cigarette lighter ColorfulLCD Digital display, show tyre preure clearly Rear-timemonitoring preure & temperatureof 4 tires Low air preure/hightemperature alarm High Temperature / Leakage / Low Battery Alarm Intelligent Shock Bootwhen car moving, dont need to turn on/off Easy to installthe external sensors There aretwo options, Build-in sensors and external sensors, it will meet your need Fit in almost 98% carson market Build-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 Battery Life: 5 Years External 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 yearsreplaceable4 free batteries as a gift, service life of external sensors 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. Please turn on monitor before install sensor 1. Pre and hold on the power button to turn on monitor 2. Install External or Built-in sensors one by one Why choose Yanace TPMS ? Yanace is the top brand and gold seller in