The TireMinder® Trailer TPMS is TireMinder® 's newest Tire Pressure Monitoring System, designed specifically for dual or single axle trailers running 70 PSI or less. The system features a highly efficient monocrystalline solar panel, with a long-lasting lithium iron phosphate (LiFePO 4) battery, crystal clear color LCD display which simultaneously displays both pressure and temperature reading for all tires, windshield-mountable monitor with included 3M strips, light-weight, 0.3 ounce transmitters, and TireMinder® Hard-Wired Signal Booster for maximum distance and reliability. Features: Highly efficient monocrystalline solar panel with Lithium Iron Phosphate (LiFePO 4) backup battery, Crystal clear LCD color display which simultaneously displays both pressure and temperature reading for all tires, Monitors up to 4 tires from 0 to 70 PSI; Designed for trailers 25FT or less, Checks for the following tire issues every 6 seconds: slow leaks, rapid leaks, blowouts, low pressure, high pressure and high temperature. Includes windshield mountable monitor, 2 ultra-light transmitters (0.3 oz.), signal booster, and micro USB charging cable