Cateye HL170/LD170 LED light set Front & rear bicycle lamps with constant & flashing modes, complete with universal fixing brackets. Fits in seconds with no tools required. These budget lights are ideal to make you visible to other road users, particularly when in flashing mode, which makes them great for urban streets or as a backup light in conjunction with a more powerful front light if you want to see where you are going off-road. Uses AAA batteries (included) and will last 100 hours in flashing mode. AAA batteries (included) 100 hours in flashing mode universal fixing brackets Front & rear bicycle lamps