Solar power + USB charging, no need to charge by connecting the car cigarette lighterColorful, Clear LCD Digital Screen to display tire informationRear time control of preure and temperature of 6 tiresLow air preure / high temperature alarm; High temperature / leak / low battery alarmSmart shock start when the car is moving, no need to turn on / offColor: blackMaterial: ABSExternal SensorEasy to install, convenient to replaceDust-Proof / Water-Proof / Anti-theftAnti High Temperate and ColdIP67 Protection / WaterproofWorking Temperature: -20-80Battery Life: 2 Years, replaceableHow 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.Package Contents:1x Tyre Preure Monitoring System6x External Sensors1x Usb CableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.