Feature: High Quality bicycle safety laser lights 5 red Led light modes: quick blink, slow blink and continue light 2 laser lights remind someone else of keeping distance, add safety Waterproof, safer in water fog when riding in the rain Kindly Note : Do not look directly at laser lights Use for student, baby stroller,jogging, walking, bicycles, car emergency, horseriding, road emergency&camping,ETC. Battery: 2 x AAA batteries (not included) Working:9-36hours Material: ABS, Acrylic & Nylon For 20-36mm tube Input Power: 100mW Package Include: 1 x bicycle rear light