Olympus Winder for OM10, OM20, OM30, OM40, OM1/N, OM2/N, OM3/Ti, OM4/Ti cameras, you can set the winder to continuous shots or single shot firing, on continuous it will take two frames per second, runs on four 'AA' sized batteries. Winder is in clean condition for its age with a few light marks. There are slight chips on the outer casing of the battery holder (see photos 2 and 4). The winder has been checked and tested and is in full working order.