The distant direct light back to the light reflection principle according to the light, day or night reverse have good optical effects of radiation. Itself has the color and in the night under the condition of light scattering, in effect, reflecting the body color of the light, so that the vehicle can easily find the rider, reflecting the good warning action. Features -Material: Plastic -Never will you need to clean or change them until the end of the bike. -Easy to install with only simple steps. Quickly install them and go on a ride! -High reflective product, good material, lightweight design, appearance, and easy to use. -High reflective, give a strong reflection under the light irradiation, keep your safety when cycling. -No batteries needed, this reflector can be used for a long time, sun and rain are available. Package list: 4 x Bike Reflectors