SolarFeatures: Solar power charging, dont need to charge by connecting car cigarette lighter At the same time, USB charging is also convenient and practical Colorful LCD digital displaying, clear to show tire information Wireless connect by external s, easy install Built-in vibration , the car automatically turns on when starting, and automatically turns off when the car stops Note: The host must be turned on before installing the . Press and hold the left button for 3 seconds For the first time, it is recommended to charge with USB for 1 hour Solar TPMSFunction: Rear-time monitoring pressure temperature of 4 tires Low Vehicle Sensors Air Pressure / High Vehicle Sensors Tire Pressure alarm High temperature / Leakage / Low Battery Alarm Solar TPMSSpecifications: Material: ABS + Metal External working temperature: -20-60 Size: As the picture BatterTPMS Features: Colorful LCD digital displaying, clear to show tire information Wireless connect by external s, easy install Real-time automatic monitoring and warning of information, such as low Vehicle Sensors Tire Pressure, high Vehicle Sensors Tire Pressure, rapid air leak, high tire temperature and low battery voltage Accurately receive the signal, and reflect the Vehicle Sensors Tire Pressure condition truthfully and intuitively Note: The host must be turned on before installing the . Press and hold the left button for 3 seconds BatterTPMS Function: Rear-time monitoring pressure temperature of 4 tires Low Vehicle Sensors Air Pressure / High Vehicle Sensors Tire Pressure alarm High temperature / Leakage / Low Battery Alarm Batter TPMSSpecifications: Material: ABS + Metal External working temperature: -20-60 Size: As the picture