1.Solar Battery: it uses solar battery and storage power 2.Main units and LED light: waterproof， shockproof design. 3.Safety device: Wont destroy circuits of the car， not easy to fall off 4.While driving at night， flashing function cab be activated with the help-of light-control and micro-vibration sensor system5.Universal fit for any car. The width of connector can adjust from 4.3cm to 6.5cm. 6.It will shut down automatically 30 seconds after parking