A unique twist on standard bicycle taillight design, the Laser Drive Rear uses two red lasers to draw guiding lines on the ground behind your bike. Besides the ability to build your own bike lane, it also has four ultra-bright LEDs which provide up to 250 lumens and nine different output modes. An extended lens offers 180 degrees of visibility, and the lightweight and durable co-molded lens/body design is waterproof (IPX7 rated). The light is both aero and round post compatible and features a convenient Micro-USB rechargeable design (cable included). SPECS MAX LUMENS: 250 WEIGHT: 84g MAX RUNTIME: 17.5 hours RECHARGE TIME: 2 hours