Next level rear cycle visibility. The Lezyne Laser Drive rear bike light is a compact, high visibility safety light with four ultra bright LEDs and two laser light. The Laser mode beams two safety strips on the ground to outline your bike and improve your visibility on the roadLight and durable co-moulded 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.Lezyne Laser Drive: Flash PatternsKey Features:Max output: 250 lumensWeight: 84gMax run time: 17.5 hours (Daytime flash)9 modes2 full length laser lines on roadAero post compatibleWaterproofRun times:Blast, 40 lumens = 2:30 hoursEnduro, 20 lumens = 5:00 hoursEconomy, 6 lumens = 15:30 hoursFlash 1, 20 lumens = 9:30 hoursFlash 2, 10 lumens = 17:30 hoursFlash 3, 20 lumens = 8:30 hoursFlash 4, 20 lumens = 13:00 hoursDay Flash 1 250 lumens = 4:00 hoursDay Flash 2 125 lumens = 7:00 hoursLaser only, Solid = 7:45 hoursLaser only, Flash = 15:00 hours