Material: ABS plastic Screen: High-brightness 2.8-inch color screen Working frequency: 433.92MHZ Long-term storage temperature: -30℃+90℃ Working voltage: 3.7-5V Working current: ≤6mA USB charging current: ≤250m A Working environment: -30℃-+85℃ Sleep current: ≤4mA Monitoring temperature range: -40℃-+130℃ Product weight: 90g Monitoring air pressure range: 03.5Bar Product size: 95*83*22cm feature: Solar charging, no need to connect to the car cigarette lighter for charging (you can also charge through the USB cable on rainy days) Color LCD digital display, clearly showing tire information. The pressure and temperature of the 4 tires are monitored at the rear. Low air pressure/high temperature alarm. High temperature/leak/low battery alarm. When the car is running, it has an intelligent shockproof cover, no need to open/close. The new gravitational acceleration algorithm uses the concept of three-dimensional displacement wake-up to dynamically update the data for the second time. The receiver/sensor uses vehicle-grade heat-resistant batteries, which have a long service life. With 4 external sensors, wireless connection, easy to install.