Product Description E-ACE Solar Power TPMS Car Tire Preure Alarm Monitor System Auto Security Alarm Systems Tyre Preure Temperature Warning 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 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-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, replaceable,Free 2 backup batteries, service life of external sensors Other products * 2 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 monitor2. Install External or Built-in sensors one by one Main Features Why choose E-ACE TPMS ? E-ACE is the top brand and gold seller in