The cateye volt 500 xc and rapid x2 rear light set is a compact and bright duo that will help to keep you seen on the roads lighting your way id the volt 500 xc a cylindrical sleek and modern looking light with a max output of 500 lumens which helps you pick out those horrible pot holes and drain covers with a simple onoffselector button the light is easy to use the button also features a small led which warns you when you are low on battery with 4 modes you are able to pick the one th