Solar-Powered Wireless Car Tire Pressure Monitor 1. Operating voltage: 3.7V 2. Waterproof rating: IPX7 3. Pressure range: 0~6BAR 4. Transmission frequency: 433.92MHz 5. Transmission power: 10dBm 6. Charging voltage: DC 5.1V 7. Battery capacity: 300mAh 8. Utilizes a high-conversion solar panel, requiring no additional charging during normal driving; wireless and can be placed anywhere; also features an Android USB charging port, unaffected by sunlight; after initial installation and charging, it provides continuous power. 9. Simultaneously senses and transmits the pressure (bar) and temperature (degrees Celsius) of all four tires, clearly displaying them on the screen for real-time monitoring of all four tire data. 10. No manual operation required, energy-saving and worry-free; the display automatically turns on when the car is started and automatically turns off when the car is stationary. 11. The sensor body is made of environmentally friendly, precision-engineered aerospace-grade aluminum, offering high strength, durability, rapid heat dissipation, and robust safety. 12. It withstands 30 minutes of immersion in water without malfunction, and continues to function normally even when navigating rain, splashing water, or crossing puddles and parking spaces. 13. Dimensions: 93x45x42mm