TireTech On Wireless Tire Pressure Monitoring System w/ Brass Transmitters 0-232 psi (4) Wirelessly measures Tire pressure & Temperature in Real Time Monitors up to 22 wheels (0-232 psi); Quickly reacts to abnormal pressure or temperature Waterproof & Dustproof sensors; Customizable Tire Pressure Monitoring Criteria Sensor Alarm system included; Guard Against Theft For use in RVs, SUVs, Caravans, Trucks, & Passenger cars