Overview: This warning lights fitted to universal vehicle drivers to convey additional warning of a hazard when stationary to passerby, motorcyclist or other drivers. When the door is opened, the red light flashes quickly, warning people behind the car to avoid accidents. Features: The light flashes quickly to warn people behind the car to avoid accidents when the door is opening. Universal wireless 3 LED car door warning light, fit for any cars, SUV, truck. No wiring, No Drilling, No Rewiring, No Damage to Vehicle, easy to install. Waterproof design, high-tech component sensing, superior endurance. Using CR2032 lithium battery, which can last for 1-1.5 years at normal operation. Specifications: Material: ABS Color: Red LED Qty: 3 Light Color: Red Item Size: 20*9mm / 0.79*0.35in Package Size: 12.1*6.2*2cm / 4.76*2.44*0.79in Package Weight: 27g / 0.95oz Package List: 2 * LED Warning Lights