Tire pressure monitoring system monitors and displays tire pressure and tire temperature in real time. If there is any abnormality, it will alarm in time to ensure driving safety. Features: Mini tire pressure detector, with LED display, real-time monitoring of tire pressure and temperature to ensure driving safety. When the tire pressure or temperature is abnormal, the tire pressure detector will sound an alarm, avoiding accidents. Built-in high-performance chip can sense and process data quickly and effectively, and accurately alarm when the tire pressure is abnormal. The screen angle is adjustable to achieve a suitable position. Adjustable screen brightness for clearer display in different environments. USB plug and play, easy to install and use. With USB port, it can charge phones, tablets, driving recorders, etc. Equipped with 4 external sensors, it has a wide range of applications, suitable for sedan car, off-road vehicle, commercial vehicle, SUV, etc. Specifications: Color: Black Material: ABS + PC Sensor Type: External Sensor TPMS Receiver-- Receive Frequency: 433.92MHz Working Voltage: 3.0V Working Current: less than 5mA Shutdown/Sleep Current: less than 100mA Storage Temperature: -40-80 celsius Charging Temperature: -10-65 celsius External Sensor-- Transmit Frequency: 433.92MHz Battery: 1 * CR2050 Pressure Measurement Range: 0-3.5BAR Working Temperature: -40-120 celsius Package Size: 135 * 105 * 35mm/ 5.3 * 4.1 * 1.4in Package Weight: 160g/ 5.6oz Packing List: 1 * Tire Pressure Monitor 4 * Sensor 1 * Manual