... ; 4.Visible from over 1km; Introduction of Bicycle Laser Tail Light1.Introduction of Use As to ... become more and more complex,along with the bicycle enthusiasts quantity is daily up, safely riding is ... double insure you riding safely.2.SpecificationArticle: Bicycle laser tail/rear lightShell Color: Red,green,blue and white ... on,press again,it is off.4.PackageA bicycle laser light,a piece of USB data line ...