Cycling Bicycle Bike Rear Tail Safety Warning 5 LED+ 2 Laser Flashing Lamp Light Pack Includes: 1 x Bicycle Laser Beam Rear Tail Light Lamp, 1 x Bicycle Mount Specifications: Working: 9-36 hours depends on the batteries, Power: 2 x AAA batteries (not included), Material: ABS, Acrylic & Nylon, For 20-36mm tube, Input Power: 1mW 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. Note : Do not look directly at laser lights, Waterproof, safer in water fog when riding in the rain, Use for jogging, walking, bicycles, car emergency, horseriding, road emergency & camping, ETC., Working time: About 9hours Bike light This little laser beam tail light will ensure your safety while riding in the darkness. It has 5 LEDs and 2 laser bulbs. The LED and the laser work independently This safety light can be mounted on 20-36mm seat post. The length and position of the laser beam varies with the angle you mount the lamp