【Real-Time Data Display】Simultaneously monitors and displays tire pressure (PSI) and temperature (°F) for all 4 tires, providing drivers with crucial information at a glance for optimal safety and maintenance. 【Dual Charging Options】This solar-powered tire pressure monitoring system can be charged via solar energy or USB, ensuring continuous operation under any conditions for worry-free driving. 【Intelligent Power Management】Features a smart auto on/off mechanism that activates when the vehicle starts and shuts down when stationary, conserving energy and extending battery life. 【Comprehensive Tire Pressure Monitoring】Compatible with various vehicles including RVs, off-road pickups, and trailers, supporting tire pressure values up to 9.9Bar for enhanced safety and performance. 【Easy Installation】Equipped with internal sensors, this tire pressure monitor can be installed quickly and easily. Specifications: Product Name: Tire Pressure Monitoring System Main Material: ABS Main Unit Battery: Built-in 3.7V 300mAh lithium battery External Sensor Battery: Built-in CR1632 button cell Screen Pressure Units: PSI/BAR Screen Temperature Units: ℃/℉ Operating Temperature: -20℃ to 70℃ Waterproof Rating: IPX7 Pressure Range: 0-9.9BAR/0-144PSI Transmission Frequency: 433.92 MHz Transmission Power: >10 dBm Charging Voltage: DC 5.1V