【Real-Time Data Display】Simultaneously monitors 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】This solar-powered TPMS offers both solar and USB charging capabilities, 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 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 external sensors, this TPMS can be installed quickly and easily in just 2 minutes without 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