The fizik ics blink rear bike light is designed for use with any ics ready fizik saddle this rear led light has a stylish design profile which looks great with any saddle and easily clips in and out of place with no need for tools clamps of screws just a great secure clip system fizik ics blink rear bike light features fits all integrated clip system ready fizik saddles colour black or silver 2 super bright led 3 modes of lighting 1 battery cr2032 tool free batt