Multiple Charging MethodsSTEELMATE V3 tire pressure monitoring system supports USB cable charging & solar charging. It can be fast-charged without occupying the car cigarette lighter socket and manual charging, to ensure the tire pressure monitoring system could work continuously. Six Types of Alarms and User-set Alarm ValuesSTEELMATE V3 tire pressure monitor system is equipped with six alarm modes, including air leak alarm, low/high pressure alarm, high-temperature alarm, sensor low battery alarm, and sensor fault alarm. Drivers can set the pressure and temperature alarm values according to their own needs. (Note: The alarm pressure value suggest to be ±25% of recommended tire pressure.) Auto Backlight & Sleep & Awake ModeThe auto-adjustable backlight of STEELMATE V3 tire pressure system can clearly display the data in low light or strong light environment. Real-time monitoring and real-time display of data are the best helpers for driving.