Stay visible day or night with CatEyes Orb Bar End lights. With constant or flashing modes to improve your chances of being seen, both from the back and from the side, Orb Bar End lights increase your visible width on the road.Key Features:Durable aluminium construction with polished black finishEasy to insert into the end of road bike handlebars with an inner diameter of 18.5mm-22mmLens acts as power / mode buttonLow profile, low weightonly 20g eachStrong sideways visibility2 x 2032 batteries includedMode: Output, Runtime  Constant: 5 Lm, 50 hrs Fast Flashing: 5 Lm, 100 hrs Slow Flashing: 5 Lm, 100 hrs