Please put this product in the dark place or vibrating environment to check whether it flickers or not, if not, the product may be under the chip protection. Just put the product in the sun or strong power light to absorb some light source light for a while, then test again.

On/Off automatically, at daytime, Sunlight through the top of the solar panels into electricity, electrical energy through solar panels is stored in rechargeable batteries, wait until dark at night, the device will turn on by itself if the car is running,and turn off by itself when the vehicle has stopped (No vibration).