NiteRider's Bullet taillight pierces through the daytime and nighttime hours with the same visual effectiveness you've come to expect. However, the aptly named Bullet™ takes the throne within our taillight line as having the longest run time (29:15 hours total) with our high capacity Li-Po battery. Because of its unique design, the Bullet™ provides 360 degrees of visible, eye catching light! And includes an extra mounting strap for Aero seatposts.