The exposure flashflare rechargeable light set with batteries and charger the flash packs a punch to get you noticed day and night it39s also bright enough to see your way home when you get caught out and small enough to hide in your pocket it39s fully sealed and easy to use simply rotate the head to turn on and off the flare is a super bright tiny rear light powered by either a disposable or rechargeable cr123 battery simply clip it onto your seatpost for 75 lumens of red lig