6 LED rear light with constant, flashing and chasing modesPrecision-cut glue-on shellIntegrated adjustable dial-fit retention systemIntegrated, removable rear LED light18 ventsDeeper rear construction for improved protection3 light modes: steady, flash, pulseAvailable in size S/M (52-59) and M/L (58-61)4 colours available: black, blue, orange, green