Usage Tips: Easy Installation, Quick Alarm: The Taimster Tire Pressure Monitoring System MS1 offers multiple alarm modes, including rapid 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, allowing you to simply set your desired safe pressure and temperature values. Alarm ranges are -25% PSI to +25% PSI relative to reference pressure and -25°F to +25°F relative to reference temperature. Alarms are triggered when monitored data exceeds the safe range. [Solar and USB Charging] This tire pressure monitoring system supports both solar and USB charging. Equipped with high-quality solar lithium battery panels, the monitor features efficient automatic charging and energy storage, helping extend its service life and ensuring reliable operation. USB charging is supported with a included USB cable, providing added convenience for continuous use. If the display indicates low power despite sufficient sunlight, connect the provided USB cable to charge the device. [Multiple Alarm Modes and Automatic Settings] The TPMS offers protection through various alarm modes, including high/low pressure and high temperature alerts. Upon sensor installation, the monitor automatically sets the current tire pressure as the reference value, eliminating the need for manual input of high and low pressure thresholds, offering a smart and user-friendly experience. Note: Due to manufacturing variations, the appearance of some accessories may differ slightly between batches; 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: 10 dBm Charging voltage: DC 5.1V Color: Black Material: Plastic Package Contents: 1 x Display Screen 4 x Sensors 1 x Charging Cable 4 x Nuts 1 x Wrench Note: Light reflection and differences in display screens may cause slight color variations between the product image and the actual item. Measurement error allowance is +/- 1-3 cm.