The Laser Drive rear light is a compact, high visibility safety light with four ultra bright LEDs. Laser mode beams two safety strips on the ground.Light and durable co-molded lens/body construction. Waterproof. Unique aero and round post compatible design. The Lezyne Laser Drive rear light provides up to 40 lumens and three output/flash modes. Side Visibility for 180 degrees of visibility. Convenient Micro-USB rechargeable design.Blast: 40 lumens, 2h:30min,Enduro: 20 lumens, 5h:00min,Economy: 6 lumens, 15h:30min,Flash 1: 20 lumens, 9h:30min,Flash 2: 10 lumens, 17h:30min,Flash 3: 20 lumens, 8h:30min,Flash 4: 20 lumens, 13h:00min,Day Flash 1: 250 lumens, 4h:00min,Day Flash 2: 125 lumens, 7h:00min.Laser OnlySolid: 7h:45min,Flash: 15h:00min.