Auto Car TPMS Tire Pressure Monitoring System Works with Sinosmart Car Navi player Main Features 1. Wireless trasmission technology, easy installation. 2. Germany Infineon chip, strong signal anti-interference. 3. All four tire pressures and temperatures displayed on the car Navi 4. When tire abnormal (high temperature, high/low pressure or low battery of sensor), will send both visual and audible warning alerts to warn the driver. 5. Sensor preset in factory, no pairing needed. 6. Use high temperature resistant lithium-polymer battery. 7. Charge-protection. 8. Sleep/wake up function. 9. With battery voltage indicator. 10. Sensitive sensor, waterproof and dustproof IP67. 11. Compact size and lightweigt.