Tire Preure Monitoring System Car Security Alarm 4 External Sensor Precision Tyre Wirele LCD Display Digital Car ElectronicsFunction-Solar charging, don't need to connect car cigarette lighter to charge-Color LCD digital display for clear display of tire information-Monitor the preure and temperature of 4 tires in real time-Low air preure/high temperature alarm-High Temperature / Leakage / Low Battery Alarm-Intelligent Shock Boot when car moving, don't need to turn on/off-Wirele connect with sensors, easy install,attached to gla-Internal sensors and external sensors options, meet all your needs-Two units (PSI / Bar) changeable, you can set the one you like.-Intelligent On and OffWhen the car is started, the vibration of the machine is automatically opened and the machineis shut down automatically when it is still, without manual operation.External Sensor- Easy to install, convenient to replace- Dust-Proof / Water-Proof / Anti-theft- Anti High Temperate and Cold- IP67 Protection / Waterproof- Working Temperature: -20-85