[Real-Time Data Display]This tire pressure monitoring system simultaneously measures and displays pressure (PSI) and temperature (℉) for up to 4 tires, providing drivers with crucial information at a glance for optimal safety and maintenance. [Dual Charging Options]Featuring both solar and USB charging capabilities, this TPMS ensures continuous operation under any conditions, offering peace of mind during your travels. [Smart Power Management]The system incorporates an intelligent auto on or off mechanism, activating when the vehicle starts and shutting down when stationary, conserving energy and extending battery life for worry-free driving. [Comprehensive Tire Monitoring]Suitable for a wide range of vehicles including RVs, off-road pickups, and trailers, this solar-powered TPMS supports pressure readings up to 9.9 Bar, enhancing safety and performance. [With Internal Sensors]Made of quartz-magnesium alloy, it is safely hidden in the tire, easy to use without worrying about theft, safer and more secure. Specifications: Main material: ABS Host battery: built-in 3.7V 300mAh lithium battery External sensor battery: built-in CR1632 button battery Screen pressure unit: PSI or BAR Screen temperature unit: ℃ or ℉ Working temperature: -20℃ to 70℃ Waterproof level: IPX7 Pressure range: 0-9.9BAR or 0-144PSI Transmitting frequency: 433.92 MHz Transmitting power: andgt 10 dBm Charging voltage: DC 5.1V