Easy Installation, Quick Alarm: The Taimster Tire Pressure Monitoring System MS1 offers five alarm modes, including quick air leak alarm, high/low pressure alarm, high temperature alarm, and sensor battery low power alarm. The sensors are pre-programmed with the monitor after production, so you only need to set the desired safe pressure and temperature values. Alarm safety ranges are -25% PSI to +25% PSI for reference pressure and -25% °F to +25% °F for reference temperature. The alarm will activate when the monitored data exceeds the safe range. Solar and USB Charging: The tire pressure monitoring system supports both solar and USB charging. Equipped with high-quality, durable solar lithium battery panels, the monitor features efficient automatic charging and energy storage, extending its service life and ensuring uninterrupted operation. USB charging is supported, and a USB charging cable is included for reliable backup power. If the display power icon flashes despite sufficient sunlight, use the provided USB cable to charge the device. Multiple Alarm Modes and Automatic Alarm Value Settings: The TPMS provides safety protection through various alarm modes, including high/low pressure and high temperature alerts. Upon sensor installation, the monitor automatically sets the current pressure as the reference point, eliminating the need for manual configuration of high and low pressure thresholds for convenient, smart operation. Note: Due to manufacturing variations, the appearance of some accessories may differ slightly. This does not affect functionality. Working voltage: 3.7V Working temperature: 70°C Waterproof rating: IPX7 Pressure range: 0–6 BAR Transmitting frequency: 433.92 MHz Transmitting power: Greater than 10 dBm