Features: 1.Solar Power: Solar energy can be absorbed and saved in high efficiency solar cells, it's powered by solar, built in lithium battery, capacity 40mah. When the light is not enough, it can be charged with a charging bank. 2.Dark Night Flash: Car alarm will only flash when it is dark Will not flash when it is light enough to keep item highly efficient and longer life. You can cover the other end by dark paper if you want it to flash in daytime. 3.No Wire Needed: Easy to install and looks clean on your dash panel, just stick it to the roof of the vehicle with corresponding glue. This led alarm light does not require a car alarm system. 4.Automatic Sensitivity: Built in light sensor, automatically sensing light intensity, it can be charged by solar whether you put switch to on or off. 5.Demention: Car anti theft light is about 5x2.5cm (1.97x0.98 inches), flashes once in about 5 seconds, exclusive new technology adds chager port to prevent rain without sunshine. Specification: Item Type: Car Solar Power Alarm Material: ABSandMetal Function: Flashes once in about 5 seconds Battery: Built-in lithium battery, capacity 40mah Applicable Models: Universal for car PackageList: 1 x Car Solar Power Alarm Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store