iFeatures: Can be more effectively to warn the behind vehicle to avoid traffic accident with too close distance when driving in the rain, fog and sandstorm weather. Provide more eyecatching position warning of the vehicle and steering indication when driving at night Water temperature protection, Anti-reverse protection dust. Suitable for all cars, trucks and motorcycles The laser beam emits downward with a certain inclination angle to avoid no direct exposure to the eyes and it projected on the ground, no need to worry about it will cover the vehicle license plate. Specification: Brand new Light Source:LED Material Type:Plastic Wattage:0.2W Voltage:1 Color Temperature:6000K Anti Collision Rear-end Car Laser Safety Fog Taillight Warning Lights External Testing Certification:CE Diameter:1.78 cm How to Install ? Connect the wire with the Reverse Light/ Parking Light/ Brake Light/ Plate Lamp Wire. Use the 3M Sticker(Inside the package) to fix the laser light,you can decide which part Adjust the angel, can be adjusted 180 degree