One year warranty service Multiple alarm types Users can set the pressure, temperature battery alarm values Operating System The Tire Pressure Monitoring System is designed for Smartphone.Compatible with IOS roid. Bluetooth 5.0 with a high-speed connection, stable transmission, accurate data, Longer Acceptance Distance. Easy installation disassemble 1, Scan QR code on the card, then download install. 2, Please follow the sensor\u0026 x27;s mark install the sensor on the corresponding tire . please install slowly to make the air pressure fully contact the sensor. (The pressure range that can be set is 14.5-92.8Psi, 1.0-6.4Bar,100Kpa-640Kpa) 4 Tire external sensors Dynamically monitor tire pressure on 4 wheels at the same time, prevent damage from a flat tire, Improve fuel efficiency, prolong tire life span, During travel, tire pressure temperature displayed in real-time send an alert when statistics\u0026 x27; abnormal. Necessary alarm system The Bluetooth external TPMS sensors are with Low Power Consumption long-lasting battery life for almost 2-3 Years. Dynamically monitor tire pressure temperature, prolongs tire life, improve road safety. It is best to reference to user manual before using.