Real-time monitor:TPMS can provide the pressure and temperature statuses of 4 tires in real time. When the data are abnormal, the driver get alarm and flashing warning . Power supply:It features the solar panel with high conversion rate and USB charging port, supporting solar charging and USB cable charging, no need to worry about the power shortage. Vibration Power On:It sense the vibration and turn on when you open the car door. Smart sleep mode(Auto Power OFF):After successful installation, it sense the vibration and turn on automatically when you open the car door. And it turn off automatically after parking for 3 minutes, rather energy-saving. Different placements:You can directly place it on the car dashboard or on your car windshield for there are 2 strong adhesive tapes on its backside. Sticking it on the front windshield is more in line with the visual habit. You can know the situations of tires without turning your head. Name:Wireless Solar External Tire Pressure Monitor