The smart 7 lux super slim front light the super slim design of this light is perfect for road bikes and for cyclists with limited handlebar space the light fits onto the handlebar thanks to it39s intuitive mounting bracket which requires no tools smart 7 lux super slim front light features 1 x aa battery up to 60 or 140 hours run time in constant or flashing modes using 1aa battery included available in black or white tough construction withstands extreme weather condition