car solar powered TPMS wireless chargeable tire pressure monitoring system with 4 internal sensor tire bar psi Wirelessly measures Tire pressure & Temperature in Real Time Match with professional internal semsors, Quickly reacts to abnormal pressure or temperature Waterproof & Dustproof sensors; Customizable Tire Pressure Monitoring Criteria Sensor Alarm system included; Guard Against Theft.Visual & audible warning indicator Professional Internal Sensors Model with Long battery life