Cateye loop 2 rear lightsuperbly versatile lighting when and where you need it theloopis uniquely designed to throw light in nearly all directions for added visibility the go anywhere mount lets you customise your gear and quickly change configurations to keep your ride safe cateyesloop attaches easily and securely to handlebars seat posts and almost anywhere else you choose features 2 modes flashing constant runtime 50hr 30hr battery cr2032 x 2buy cateye accessories from chain