Bluetooth TPMS (Electronic) Transmitting Caps, For Trailers, RV's, Autos and all Vehicles with Tires! Monitor your Tire Pressure on iOS/Android Smartphone or Tablet. Safety monitor for tire pressure Monitor tire pressure of auto or trailer tires up to 40 feet distance on mobile device via Bluetooth 4 Bluetooth links to your iOS/Android smartphone or tablet Works on up to 4 auto or trailer tires Clear display for the status of your 4 tire pressures on App
