The waterproof sensors use Bluetooth technology to communicate important safety information right to your smart device with the iN•Command TPMS app. Just open the app to assign a sensor to each tire by scanning the QR code with your device's camera to receive audible alerts. TPMS can be used independently of iN•Command® Control Systems. N•Command TPMS monitors the air pressure and temperature in each tire, sending alerts and other information through the iN•Command app.