Jewelry Design & Repair. Digital Readout& Linear Scale. Welding & Soldering Tools. Rosin Heat Press Machine. Wireless Solar TPMS LCD Car Tire Pressure Monitoring System + 6 External Sensors. Wireless Solar TPMS LCD Car Tire Pressure Monitoring System + 6 External Sensors 7 Alert Mode Truck RV Caravan. 1, Large lcd scree, backlight adjustment. 2, LED panel, Comes with both solar and USB charging modes for efficient charging. 3, Multiple installation methods, equipped with two brackets for a broader field of view. 4, High-precision temperature and pressure monitoring, simultaneously displaying 4 or 6 tires. 5, 7 alarm modes and real-time display: High and low pressure alarms, high temperature alarm, sensor low battery alarm, rapid tire leakage alarm, TPMS sensor data loss alarm, display low battery alarm. 6, Real-time pressure and temperature display for 6 tires, allowing you to focus on long trips or transportation. Factory settings: High pressure alarm: 116Psi, low pressure alarm: 29Psi, high temperature alarm: 149? 7, RF wireless technology, automatic alarm for abnormal tire pressure and temperature. 8, Monitoring reports in various units such as PSI, BAR, F°, and C°. 9, Supports tire position swapping function. 10, Infenion chipset and explosion-proof battery. 11, Sensor batteries can be replaced by drivers, small size, lightweight, high tire pressure sensing accuracy (error range not exceeding 2PSI), easy installation. 12, The 550S can accommodate various sizes of trailers, RVs, motorhomes, trailers, school buses, and commercial transport vehicles.