65 Lumens for visibility from over 2km day or night. Be seen with balanced optics designed for 270 degree visibility near and far. Two day-time visibility modes and two night modes. Day modes: 65LM flash-5.75hrs, 35LM all-day-10hrs, 25LM steady-4.5hrs. Night modes: 65LM flash-23hrs, 5LM steady-21hrs. Battery save mode at 5% life helps to ensure a safe ride home with a depleted battery. The Quick Connect bracket with 16-degree offset compensates for the seat post angle. Includes a quick connect bracket and USB charging cable.