Cateye omni 5 rear bke lightstay visible when riding after dark thanks to this rear light from cateye'. '.strtoupper('f')eaturing five bright led lights that utilise omni directional technology for 360 degree visibility and with three flashing modes constant, rapid and flashing mode, you can help light up your way and stay illuminated.with two aaa batteries, the omni 5 will run up to 120 hours'. '.strtoupper('t')he simple, tool free flextight bracket and included clothing clip allow you to easily attach the omni 5 anywhere youd like.featureslight source red led x5battery aaa alkaline battery x2runtime and light modes approx'. '.strtoupper('6')0hrs in constant, 90hrs in flashing, and 120hrs in rapid modemount bracket included 12.0 32.0mm flextight sp 11visibility length angle 360 degreesadditional features clothing clip includeddimensions 36.0 x 75.0 x 21.9mmweight 41.8 grams light unit and batterybuy cateye accessories from chain reaction cycles, the world's largest online bike store.