The Cateye Sync Core 500 lumen front light is Cateyes newest and most high tech front light. Part of their SYNC system the Cateye Core light can be paired with up to seven other lights and all can be controlled from your phone so you can customise your overall visibility. As well as being part of the SYNC system the Cateye Core 500 is a great light on its own. It is bright enough to be effective during the day and to light your way at night. It can be used in multiple modes from 100 lumen with 120 hours of run time to 2 hours on the maximum 500 lumen with a constant beam. Whether you are commuting, or just regularly riding on the road in poor light this this one light that will see you through the winter. The heart of the SYNC lighting system Premium textured polycarbonate body 500 Lm output for maximum visibility Superior side-on visibility for added safety Customise modes via the SYNC app Power button communicates pairing battery info GREEN ON other l...