Specifications: The pressure and temperature status of the four tires can be provided in real time. When the data is abnormal, the driver will get a voice alarm and a flashing warning icon. Just plug it into the car cigarette lighter socket and start your car, then it will open. In addition, it has a USB charging port on the outside that can charge USB-powered devices, such as mobile phones and tablets. The LCD display has bright, clear data and is easy to read, allowing you to quickly and easily understand your car's status. Four sensors are also available for use on rainy days. They are highly sensitive and highly accurate for measuring pressure and temperature. The system is widely used in 4 tires, vehicles with a maximum pressure of less than 8 bar, such as commercial vehicles, off-road vehicles, minibuses, cars and so on. Package list: 1 * Cigarette Lighter Screen 4 * External/Internal Sensors 1 * User Manual Introduction of receiving host 1Keystroke /Interface description Picture for reference only, subject to object) 1. USB charging port 2. Left selection key 3. Menu key 4. Right selection key 5. Amplifying hole Interface display Type: Tire Pressure Monitoring System Material: Plastic [External/Internal Sensor] Battery: 1 x CR1632 Battery (Included) Work Voltage: 2-3.6V Work Temperature: -40-125 Celsius Degree Work Pressure: 0-99PSI Pressure Accuracy: Plus or Minus 1.5PSI Waterproof Rating: IP67 Transmission Frequency: 433.92MHz [TPMS] Operating Voltage: 5V Working Environment: -40 - 85 Celsius Degrees Transmission Frequency: 433.92MHz Pressure Unit: PSI/Bar Temperature Unit: Deg.C/Deg.F. Power Supply: Cigarette Lighter Socket Features: LCD Display, USB Car Charger, Wireless Sensor Diameter: 2.1cm/0.83' (Approx.) Sensor Height: 1.6m/0.63' (Approx.)