They charge from your computer or any device with a USB port.

Takes 2 hours to fully charge and has a Runtime of 10+ hours on the highest setting. Making your bicycle stand out with an unmatched 360º visibility so you and your loved ones are safer in any low light conditions.

Be Seen by Everyone! See Everything Better! Enjoy Your Ride! Bike lights are your first line of defense in the dark! Break The Dark And Make Yourself Seen With The New Team Obsidian Light Set! Five Light Mode Options The Headlight features an one-touch switch with Five different lighting modes depending on your preference.

Head Light: 4hr (full brightness) ,11hrs (half brightness), 16hrs (Low brightness) 12hrs (slow flashing), 11hrs (fast flashing) Tail Light: 3hr (full brightness) ,9.5hrs (half brightness), 10hrs (flashing)

Easy to detach and suitable for camping, walking dogs or outdoor adventure activities. Taillight features constant and flicker mode to alert following cars/ people.