AXA reef lighting is equipped with light guide technology. The entire taillight is illuminated, even on the side. The LED taillight is visible up to 600 m and has an on / auto and off switch.Mounting: On luggage carrier with 80 mm holes. Burn time: LED with more than 50,000 hours life Batteries: Included 2 AA LR06 batteiren with a burn time of about 100 hrs.