WOWOWO New Cycling Bike MTB Bicycle 2 Laser Beam 5 LED Rear Tail Safety Flashing Light 100% Brand New and high quality 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, add safety?This little laser beam tail light will ensure your safety while riding in the darkness. Working: 9-36 hours depends on the batteries Waterproof, safer in water fog when riding in the rain