PAPAGO GSBT500-US GoSafe TPMS 500BT Bluetooth Tire Pressure Monitor System (Black) Smart Tire Pressure Monitor System -With the built-in Bluetooth simply connect your smart device with the GoSafe TPMS APP. This application allows drivers to monitor tire pressure and temperature at the same time simply by looking on their smart device Non-Stop Monitor & Reliable Alarm System - GoSafe TPMS 500 BT continuously monitors tire pressure and temperature. The alarm system will deliver an audio alert or text when your tires are above or below a safe level that you can set in the GoSafe TPMS APP Mini Compact Design - Kit includes four external plug-in sensors and one receiver. GoSafe TPMS 500 BT sensors are only 9g and are made from durable, lightweight material so they do not affect the tire's operation by weighing it down Easy Installation. Precise Stats. - With GoSafe TPMS 500 BT, drivers can easily plug in the external tire pressure monitor sensors and set up the monitor system within 3 minutes Within 1PSI Precision -Placed directly on your tire valve caps the GoSafe TPMS 500 BT external sensors are much more precise and stable than the traditional internal TPMS