Please note!!! When you receive the package and turn onthe receiver, the receiver displays -- or 00, please dont worry. You only need to mount the on the tire, wait for about 1 minute, and you will see the display shows the pressure and temperature of the tire. Install the built-in Type: Jansite Intelligent SolarCar Vehicle Sensors Tire Pressure -Solar charging, dont need to connect car cigarette lighter to charge -Color LCD digital display for clear display of tire information -Monitor the pressure and temperature of 4 tires in real time -Low Vehicle Sensors Air Pressure/high temperature alarm -High Temperature / Leakage / Low Battery Alarm -Intelligent Shock Boot when car moving, dont need to turn on/off -Wireless connect with s, easy install, attached to glass -Internal s and external s options, meet all your needs Two units (PSI / Bar) changeable, you can set the one you like. Build-in ( Option ) - Please install in by Professional car center -More stable and accurate -Anti High Temperate and Cold -IP67 Protection / Waterproof -Working Temperature: -40-125 -Battery Life: 2-3 Years (cant change the battery) External ( Option ) - Easy to install, convenient to replace -Dust-Proof / Water-Proof / Anti-theft -Anti High Temperate and Cold -IP67 Protection / Waterproof -Working Temperature: -20-85 -Battery Life: 1-2 Years, replaceable Risk warning all the time Now the condition of the wheels under control, guard you every time TPMS will turn on when the car is moving and will turn on when the vibration starts. It does not need to be turned on or off by yourself. Solar charging New energy solar charging provides working power. High power transmission and performance. Color digital display Color digital display shows different colors of Vehicle Sensors Tire Pressure and tire temperature, making it clearer and easier to read. The real-time monitor prevents the car from being dangerous due to abnormal Vehicle Sensors Tire Pressure. is suitable for most cars Internal and external options. IP67 waterproof rating, no need to worry about high pressure car wash, flooding, dustproof, high temperature and low temperature. The is suitable for most cars on the market.