... city roads become more and more complex,along with the bicycle enthusiasts quantity is daily up, safely riding is concerned by ... hours,these can double insure you riding safely.2.SpecificationArticle: Bicycle laser tail/rear lightShell Color: Red,green,blue and white ... . 5 A Charge voltage 4.2-5VDC-500 mABattery: 14500 rechargeable battery, capacity 1200 mAh, voltage 3.7VWork Time: continuous wok ...