The Black Bookman Curve Bicycle Rear Light is a rechargeable high power bike light with an easy attach and detach handlebar with an elastic silicone band. This Rear Bike Light is great for any conditions that mother nature throws at you. The design of the glass ensures a wide range of light, not only in front of the cyclist but reflects off to the sides. This results in cyclist peace of mind that the light provides clear visibility of the roads as well as being visible to other travelers at 180 degrees.