Packed with more technology than meets the eye, the Cygolite Dice fires up the night with an incredible amount of light, and stands out in broad daylight with intense flashes. It also senses day and night, automatically switching to the optimal flash mode. Engineered for road cyclists, it uses a low profile, flexible mount designed for most handlebars including aerobars. Features: Enhanced Cycling Optics that cast an extra wide and long range beam compared to conventional lighting optics Low battery indicator and light memory mode saves the mode the rider is using when the light is turned off Water-resistant design for all riding conditions Eight lighting modes for use on mountains, roads, and commuting Run Times: 0.75 Hours (Boost) 1.5 Hours (High) 2.5 Hours (Medium) 3 Hours (SteadyPulse High) 5 Hours (SteadyPulse Low) 10 Hours (DayLightning Single Flash) 15 Hours (Low) 24 Hours (DayLightning Triple Flash) Specifications: Brightness: 150 Lumens Battery Type: Rechargeable (USB) Run Time: 0.75 - 24 Hours Beam Color: White Color: Black Weight: 30g