The no compromise commute or get home light the exposure flash front light jack the lad the flash packs a punch to get you noticed day and night its also bright enough to see your way home when you get caught out and small enough to hide in your pocket its fully sealed and easy to use simply rotate the head to turn on and off the flash can use either disposable or rechargeable batteries the best performance will be from using exposure lights own batteries the flash will produce 40 lum