Intelligent induction: When the car starts, the display will automatically turn on the vibration sensor, and sleep after 5 minutes of rest, no need to manually switch Second-level alarm: the sensor sends data every 2 seconds/time, the host updates the data every 2 seconds/time, detects the tire condition at all times, and prompts "accident" Working temperature: battery high and low temperature protection. Strictly pass the high and low temperature work test Charging mode: 1+1 charging mode. Solar charging, 24-hour battery life, USB charging interface supports charging in rainy days Material: ABS Dimensions: 9.5 x 8.3 x 2.2cm Working voltage: 3.7-5V. Storage temperature -30C-90C. Working temperature -30C-85C. RF transmission frequency 433.92MH50KHz Working current 6mA Working voltage 3.7-5V Display mode: LCD color screen Packing list: 1x host+4x external sensor+1xusb interface +4xnut+1xwrench+1xinstruction