The City Rover 700 USB Headlight from Portland Design Works is a rechargeable headlight with a powerful lithium-ion battery and a bright Cree LED bulb that illuminate the road ahead for improved visibility and safety on your commute or night ride. The precision reflector brightens your field of vision out front and to the sides for up to 2 hours on high, 8 hours on low, or 36 hours in flash mode. In case of a low battery, the City Rover will run for an additional 15 minutes in low power safety mode after the low battery indicator light comes on. The lumens and burn times are FL1-certified, and the light uses a Texas Instruments circuit for long-term durability.