This light is all internal, self-contained, USB-C rechargeable, and slim enough to fit in your pocket. It features an extremely smooth and progressive light field from the front of your tire all the way to where you are looking. It also features added side marker lights to help with visibility from the side, much like on cars. It incorporates a quick-release fiberglass-reinforced nylon mount, borrowed from those clever camera guys, to keep everything pointing in the right direction and make it easy to put on and take off with one hand. Features a custom mount solution to fit underneath most bike computers for that clean and tucked look. Proudly and capably made in Chicago, IL. Includes: Detour Road Bicycle Light Quick-Release Bar Mount (fits 31.8mm and 35mm bars) USB-A to USB-C Charge Cable 2.5mm Hex Wrench Instructions Specs: Mounting Location: Handlebar Application: Front Bike Light for Road/Gravel and commuting Charging: USB-C with Pass-Thru Charging (0 to 80% in 2 hours) Lumens: Approximately 1200 Battery Capacity: 3.6V 5000mah (18.0 Wh) Weight: Lighthead = 150g, Quick Release Mount = 36g Runtime: Adaptive 2.6 h (155 min) High 1.7 hr (104 min) Medium 4.2 hr (250 min) Low 8.5 hr (500 min) Daytime Strobe 10 hr (600 min) Nighttime Flash 4.5 hr (270 min)