【Real-Time Data Display】Simultaneously measures and displays tire pressure (PSI) and temperature (℉) for all 4 tires, providing drivers with crucial information at a glance for optimal safety and maintenance. 【Dual Charging Options】This solar-powered TPMS can be charged via solar energy or USB, ensuring continuous operation under any conditions for worry-free driving. 【Smart Power Management】Features an intelligent auto on/off mechanism that activates when the vehicle starts and shuts off when stationary, conserving energy and extending battery life. 【Comprehensive Tire Pressure Monitoring】Suitable for various vehicles including RVs, off-road pickups, and trailers, supporting tire pressure values up to 9.9Bar to enhance 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/BAR Screen temperature unit: ℃/℉ Working temperature: -20℃ to 70℃ Waterproof level: IPX7 Pressure range: 0-9.9BAR/0-144PSI Transmitting frequency: 433.92 MHz Transmitting power: >10 dBm Charging voltage: DC 5.1V