The MicroSync Sync Cord Reducer for MicroSync is an adapter that makes sync cords with miniphone (3.5mm) plugs compatible with MicroSync sub-miniphone (2.5mm) ports. The rear has a miniphone female socket and the front has a sub-miniphone male plug.
MicroSync II
Sync Cord Reducer (Adapter) for MicroSync - Miniphone Female to Sub-Miniphone Male