TireMinder A1AS TPMS system with a signal booster and 6 transmitters. World's First Monitor & Smartphone Tire Pressure Monitoring System, with a Full Color 5.5 Inch Diagonal LCD Screen, with compatibility to iPhone, iPad and Android devices! FEATURES: Smart TPMS and Monitor View up to 22 Tire Readings at once TireMinder APP Compatible Monitors up to 8 Different Vehicles Standard External Transmitters with Replaceable CR1632 Batteries Signal Booster Included 3 Year Warranty *PHONE not included

 PROP 65 WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling. For more information, visit www.P65Warnings.ca.gov