A simple, powerful tool for monitoring tire conditions. Features straightforward visual alerts and powerful audible alerts, with easy to understand icons showing what type of issue is occurring and where. From boat trailer to coach, the A1A monitors up to 22 tire positions, at up to 232 PSI. Each position updates every 4 minutes. Also performs self-diagnostics every 5 seconds. It also will immediately alert if the internal tire pressure rises above 167°F. The A1A also offers front or rear disconnect modes. Separating a towing vehicle from a towed trailer, 5th wheel, car, etc., is quick and easy. Includes a booster to eliminate electronic interference screw on transmitters, and much more. TireMinder®, the multi-year gold medal award winning TPMS!