35 lumens provide visibility from over 400m day or night. Wide visibility angle intended for city use. Two day-time visibility modes and two night modes. Day flash 35LM-8hrs, night flash 35LM-16hrs, day steady 20LM-3hrs, night steady 2LM-20hrs. An integrated light sensor for auto-brightness control. 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 micro USB charging cable.