Feature: Light can prevent intrusion at night. It is easy to install and looks clean on the dashboard. Built-in light sensor, this led light will flicker at night and not flicker during the day. (If you want it to flash during the day, you can cover the other end with black paper.) This LED warning light does not require a car alarm system. No wires are needed, just stick on the roof of the car with matching glue. Solar energy can be absorbed and stored in high-efficiency solar cells. No need to install batteries. It is powered by solar energy and can be recharged by usb. When there is enough sunlight during the day, it can flicker all night. You don't need to put it directly in the sun. The sunlight above the panel is sufficient. If you turn the switch to "On" or "Off", you can perform solar charging. Name: Solar analog anti-theft warning light Electricity: solar, usb charging Light: blue or red L ED: Highlight SMD LED Size: 5CM*2CM*1.3CM Function: Intelligent sensor does not work during the day, solar energy automatic charging, automatic flashing at night Effect: The simulated car anti-theft lamp flashes once every 5 seconds