Denshine LED Cycling Bike Bicycle Rear Tail Safety Warning Flashing Light 100% new and high quality. Fits for most type of bikes. Easy to installation. 7 kinds of flash mode: Always bright, flash, slow flash, left to right, right to left and left to right slow flash, flash, flash back and forth. 2 laser lights remind someone else of keeping distance. Laser 2 modes: steadyflashing Waterproof, safer in water fog when riding in the rain.