This is a Rec-Mounts cycle computer adapter. It's for Lezyne cycle computers. It's compatible with CatEye brackets. A CatEye bracket (H-34N) is included as a bonus, so you can use it right away. Rec-Mounts Lezyne Cycle Computer Adapter H34-LEZ Weight: 17.5g ￥2,450 〇 Bonus CatEye Flex Tight Bracket 533-8827N H-34N ￥726 Purchased new in 2023. Bought to attach a Lezyne cycle computer (Mega GPS XL). It has been sitting on a shelf, hardly used. There are no functional issues. There are no noticeable scratches, but please forgive any minor scratches due to storage. Please check the Rec-Mounts website for compatible cycle computers. I will sell it to someone who understands that it is a used item. ------- Cycle computer adapter to convert from the Flex Tight Bracket H34-N (533-8827N) included with CatEye lights to a LEZYNE cycle computer. Compatible models (as of April 1, 2021): Mega GPS XL / Mega C GPS / Super GPS / Super PRO GPS / Micro COLOR GPS / Micro GPS / Macro GPS / MACRO PLUS GPS / Mini GPS, etc. #RecMounts #CycleComputer #CycleComputer #Lezyne #CatEye #Bicycle #RoadBike #CrossBike