Intelligent induction: When the car starts, the display will automatically turn on by sensing the vibration, and it will go to sleep after 5 minutes of rest, without manual switching. Secondary alarm: The sensor sends data every 2 seconds/time, and the host updates the data 2 seconds/time. It detects tire conditions at all times and prompts "accidents". Working temperature: high and low temperature protection of the battery. Strictly pass the high and low temperature work test. Charging mode: 1+1 charging mode. Solar charging, 24 hours battery life, USB charging port, support rainy charging. Material: ABS Size: 9.5 X 8.3x 2.2cm Working voltage: 3.7-5v. Storage temperature -30c-90c. Working temperature -30c-85c. The radio frequency transmission frequency is 433.92mh50khz. Working current is 6ma. Working voltage is 3.7-5v. Display: LCD color screen packing list: 1 X host 4 X external sensor 1 X User Manual 1 X wrench 4 X nuts 1 X Android data cable 1 X double-sided tape