The name says it all! 30 Days of continuous use in "Low" mode, 32 hours of continuous use in "High" mode. 4-mode electronic switch (press button - High, Medium, Low, and SOS flashing). Powered by 3 D-cell alkaline batteries (not included). The rubberized housing is water and impact resistant. The removable globe and built in recessed hook, at the lantern's base, could be used for hanging the lantern as an area light. Lifetime limited warranty.