Wealers Cycling Bicycle Bike Rear Tail Safety Warning 5 Led+ 2 Laser Flashing Light (battery's Included) 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 safetyThis little laser beam tail light will ensure your safety while riding in the darkness. Waterproof, safer in water fog when riding in the rain Use for jogging, walking, bicycles, car emergency, horseriding, road emergency & camping, ETC. Working: 9-36 hours, Power: 2 x AAA batteries (included)