Features: 1.Solar Powered: Do not need to install battery. It's powered by solar. It can blink for whole night after enough sun shining in daytime. 2.Anti Theft light: The light can discourage break?ins in nighttime. Easy to install and looks clean on your dash panel. 3.Flashing at Night: Built?in light sensor, this LED light will flash in nighttime and will not flash in daytime. This LED alarm light does not require a car alarm system. 4.Easy Installation: No wires needed, just stick it to the roof of the vehicle with corresponding glue. Solar energy can be absorbed and saved in high efficiency solar cells. 5.Rechargeable: You need not put it under sunshine directly. Sunshine above the dashboard is enough. Adds chager port to prevent rain without sunshine. Specification: Item Type: Car Solar Power Alarm Material: ABS+metal Built-in Battery: Lithium battery 100mah Power: 0.5 (W) Voltage: 5 (V) Current: 0.1 (A) Size: Approx. 5 x 2.5 x 1.5cm/1.97 x 0.98 x 0.59in Applicable Models: Universal for car PackageList: 1 x Car Solar Power Alarm