Must see before buying: For Android DVD APP compatible for Android car DVD/multimedia player/GPS navigation. Plug and play, easy and convenient installation.Please download TPMS APP according to the tutorial provided by us before use Specifications and functions -The usb interface is directly connected to the vehicle central control DVR -Car DVR display data -Rear-time monitoring preure & temperature of 4 tires -Low air preure/high temperature alarm -High Temperature / Leakage / Low Battery Alarm -Wirele connect by sensors, easy install -Build-in sensors and external sensors options, meets all your need -Freescale chip sensors and fit on almost 98% cars on market Build-in Sensor ( Optional ) -Please install in by Profeional car center -More stable and accurate -Anti High Temperate and Cold -IP67 Protection / Waterproof -Working Temperature: -40-125 -Battery Life: 5 Years;Not replaceable External Sensor (Optional) -Easy to install, convenient to replace -Dust-Proof / Water-Proof / Anti-theft -Anti High Temperate and Cold -IP67 Protection / Waterproof -Working Temperature: -20-80 -Battery Life: 2 Years, replaceable Please turn on monitor before install sensors 1.Connect the central control DVR, download the TPMS APP, and open the APP 2.Install external sensors one by one. How to replace the External Sensor battery? 1. Remove the dismantling gasket 2. Wrench the shell with a wrench 3. Remove the battery 4. Replace a new battery. Main Features Alarm Monitor TPMS simultaneously show 4 tires' preure or temperature.TPMS automatic update the tire's preure and temperature, keep your driving safe. Tire Preure Monitoring system will be warning when the tire temperature is high, preure is low. Slow and fast air leakage alarm when tire piercing TPMS APP Installation Steps Suitable For Car Models How to choose a sensor? Built-in Sensor External Sensors Product Details Product installation method