Specifications and functions -Solar power charging, dont 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, dont need to turn on/off-Wirele connect by sensors, easy install-Build-in sensors and external sensors options, meets all your need-Freescale chip sensors and fit on almost 98% cars on 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;Not replaceable 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 Years, replaceable Please turn on monitor before install sensors 1.Pre and hold on the poewer button to turn on monitor; 2.Install external sensors one by one. How to replace the External Sensor battery? 1. Remove the dismantling gasket2. Wrench the shell with a wrench3. Remove the battery4. Replace a new battery. Main Features Omnidirectional protect tires every moment Automatically start tire preure monitoring after starting the car Suitable for many kinds of cars and environment Suitable for Cars, ORV, SUV, MPV, Minibus, Wagon, etc. USB Charging Interface How to choose a sensor? External Sensors Packing List K08(External): K08P(Built-in):