To further rider safety and visibility, the CherryBomb(TM) 100 employs a custom made, built in reflector which allows the rider to be night time visible even when the taillight is in the off position. Clip and bike mounts are included, for flexible mounting options. FEATURES a Lumen Output: 100 a 4 Modes with a Run Time up to 136h a 2 x AAA Alkaline Battery Powered a Weight: 82g a Battery: 2 x AAA Alkaline a Highly Visible up to 1 Mile a 100 Lumen Daylight Visible taillight a Water / Dust Resistant IP64 Rated RUN TIME Fast Flash - 96:00h Pulse Flash - 136:00h Steady High - 72:00h Steady Low - 127:00h