The Lezyne Laser Drive Tail Light projects two laser beams alongside your bike to delineate a boundary, so passing vehicles can give you the space you deserve. The laser beams provide added confidence by delivering a greater margin of safety where vehicles previously threatened your safety. This means you'll be able to ride without close calls on the road, especially in areas where cyclists aren't exactly respected or looked out for on the road. Besides its innovative laser beams, the Laser Drive Tail Light features nine distinctive LED settings that alternate between solid beams and flashing modes, so you can customize it to your specific needs on the road. The battery lasts up to 17. 5 hours on its lowest flashing setting, so you can ride all night long without it dying prematurely. And when it does die, it's rechargeable via a micro-USB cable for rapidly charging it at work and home.