【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. 【Easy Installation】Equipped with external sensors, this tire pressure monitor can be installed quickly and easily in just 2 minutes, without the need for tire removal, wiring, or complex balancing procedures. 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