Forklight Light Sets are only compatible with Bontrager Satellite Elite fork/light forks;Light sets are available specifically for Ride+, Dynamo Hub or Battery power.;Sets include a left and right light unit and all required small parts;Sets 426848 and 428356 are compatible with hub dynamo-equipped bicycles;Sets include a left and right light unit and all required small parts;W284484 is a single light unit for use with a Dynamo powered rear light. To combine with 426848;416077 is a Single Battery Case Cover. To combine with 426847 and 428355;