Fully functional with battery. The mount strap has been shortened as I had it mounted on the 45 degree stem from wheel hub to seat post. Maximum attention. The CatEye Rapid 3 tail safety light includes a high power center SMD-LED and two 5mm LEDs for outstanding visibility. 3 LEDs OptiCube™ lens technology AA alkaline battery 3 modes Mode memory function FlexTight™ SP-11 bracket (ø12-32mm)
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