Use Transmitr for wireless on/off, battery status, indicators and mode selection. 65 Lumens provide visibility from over 2km, day or night. Be seen with balanced optics designed for 270-degree visibility near and far. Two daytime visibility modes, two night modes and indicator capability. 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. Includes a quick connect bracket and USB charging cable.