This item is brand New never been used only opened box to show everything included. This bundle has additional sensors for a total of 12 sensor caps with color monitor display. Comes with all accessories included with manual. If you have any questions feel free to ask. TPMS TIRE PRESSURE MONITORING SYSTEM – Real time display of pressure and temperature on a 3.5 widescreen color monitor. Monitor gives visual, audible and textual alerts when conditions are at unsafe levels. Monitor reports in multiple units including in PSI, BAR, F°, and C°. User adjustable high and low pressure alarm levels. Montiors pressures between 0 to 218 PSI. MULTI VEHICLE MONITORING SYSTEM – TST 507 systems accommodate all sizes of tow vehicles, 5th wheels, RVs, motor homes, boat trailers, agricultural trailers, construction trailers, motor homes, construction equipment and commercial transport vehicles. Monitor up to 110 tires: 14 in the power position, 4 trailers at 24 tires each. WIRELESS SENSOR TECHNOLOGY – Includes cap style sensors with user replaceable CR1632 batteries. Sensors include anti-theft feature. Sensors are light, compact and water resistant for use in all climates and weather. Easy and quick installation. EASY TO INSTALL with CHARGER + REPEATER – Kit includes: 1 TST Wide Screen Color Display, 8 cap style sensors, 1 507 repeater, 2 installation wrenches, rubber display mount, suction cup display mount, USB charging cable, 12V charging adapter, and detailed user manual.