COLORFUL DIGITAL LCD DIGITAL LCDTire Preure Monitoring System provides colorful screen, beautiful visual appearance. The display can help you better monitor the condition of the tires, it can be placed anywhere stably and you can easily read the data. 5 ALARM MODESIncluding fast leak alarm, high/ low-preure alarm, high-temperature alarm, display low power alarm, and sensor battery low power alarm, to ensure your safe driving. (Pre any button will stop alarming) 2 CHARGING WAYSSupport USB cable charging and solar charging. It does not occupy the car cigarette lighter socket, ensure the tire preure monitoring system will work continuously. And the battery has a long endurance (each charge can be used for one month). [Solar power charging is unstable because of weather, it only can help extend battery's energy consuming.Please charge by cable when monitor is out of power] SUITABLE FOR CAR TYPENOT INCLUDE TRAILER AND RVSuitable for tire preure range le than 4.0 Bar58PSI, like sedans, SUV, MPV . SMART SENSORS4 wirele external or internal sensors, easy installation & receive real-time signal. The preure and temperature data can be switched, with preure unit: PSI/Bar and temperature unit: C/F selectable.(The internal sensors needs to be installed at the garage, and the tire needs to be dynamically balanced after installation.)