The Niterider TL 6.0 has five ultra bright LED's with four different operating modes including three different flash modes. The amber Side Lights help to provide even more visibility from the sides of the rider. The TL 6.0 will help keep you safe and seen from behind (180 degree visibility). The TL 6.0 operates on 2 AAA batteries (included) for up to 60 hours on flash.4 Modes with a Run Time up to 60h2 x AAA Alkaline Battery PoweredIncreased safety with 210deg of Visibility25 Lumen taillight with Eye Catching Flash PatternsWater / Dust Resistant IP64 RatedSeatpost mount included - built in clip holds onto various straps belt loops etc