note: Choose the size of the radio according to your needs USB AndroidVehicle Sensors Tire Pressure Monitoring System Display 4 s for Android Car DVD Radio Multimedia Player Type: Intelligent SolarCar Vehicle Sensors Tire Pressure -Solar power charging, dont need to charge by connecting car cigarette lighter -Colorful LCD Digital displaying, clear to show tire information -Rear-time monitoring pressure temperature of 4 tires -Low Vehicle Sensors Air Pressure/high temperature alarm -High Temperature / Leakage / Low Battery Alarm -Intelligent Shock Boot when car moving, dont need to turn on/off -Wireless connect by s, easy install -Build-in s and external s options, meets all your need -Freescale chip s and fit on almost 98% cars on market Two units (PSI / Bar) changeable, you can set the one you like. Build-in ( Option ) - Please install in by Professional car center -More stable and accurate -Anti High Temperate and Cold -IP67 Protection / Waterproof -Working Temperature: -40-125 -Battery Life: 5 Years, irreplaceable External ( Option ) - Easy to install, convenient to replace -Dust-Proof / Water-Proof / Anti-theft -Anti High Temperate and Cold -IP67 Protection / Waterproof -Working Temperature: -20-85 -Battery Life: 2 Years, replaceable Risk early-warning Accurate early warning, safer driving, more reassuring Suitable for many kinds of cars Suitable for Cars, ORV, SUV, MPV, Minibus, Wagon, etc. Connect U-disk to DVD by USB port Intelligent Chip Rapid induction abnormality, beep early warning Intelligent On and Off When the car is started, the vibration of the machine is automatically opened and the machine is shut down automatically when it is still, without manual operation. The difference between built-in and external