Knog Skink Translucent Body Red 4 LED Taillight BE SAFE - BE SEEN ! 4 LEDs Flexible silicon body with an integrated clip feature allows for quick mounting (ideal diameter 22 to 32mm) Visible up to 1/3 of a mile Burn time of 30 hours constant, and 220 hours in flashing mode 60,000 millicandelas output 6 modes: Constant, and 5 different flashing modes Uses 2 AAA batteries (included) Low battery warning indicator 58 grams (including batteries)